I think when we speak about different flavours of enneagram, we need to take wings and stackings into account too, INFP 4w3 is for example different than an INFP 4w5, so/sp is different than sx/so and so on... Also I do not believe, that all the variations are possible, INFPs are most likely 4s, I could see 6, or perhaps 2 as another possibilities for INFP, but hardly anything else. But... I like to play, I like to play with this idea and I'll describe how each an every INFP will be different enneagram vise.
INFP 1 - The most of a perfectionist and orderly of all INFPs. Hardworking for what they believe is right, very firm moral compas, having personal values and adhering to them would be especially important for an INFP 1. INFP would also develop their Te far better than any other of this type because of the need for control and order. This INFP might often switch to ESTJ moods, or simply come across are very firm in usage of their Te.
INFP 2 - This would be the most bubbly and people oriented type of INFP. The true lover of people and their uniqueness. This INFP would probably have very special gifts combined, they would be great at understanding people on the individual and personal level and help them just as much as they can, while not being too tensive about it, like Fe types sometimes can be. This type would most likely come across as an ISFJ.
INFP 3 - This combination is hard... This INFP would probably feels in a conflict with their own persona, their own desire and needs. An introverted achiever, who can be competitive while staying sympathetic and emotional. This INFP would probably learn well how to put their feelings aside, when a job needs to be done. Tough and focused, while staying sentimental. I can imagine such INFP would have to fight with their introversion and feel at the conflict between their need of being alone and being appreciated. Sometimes they might experience outbursts of extraverted energy. I can imagine this INFP would be highly motivated to achieve something great, to change society or to become a famous artist. There is a risk of emotional troubles and turbulence when such INFP forgets about their feelings completely or try to ignore them. I think they would be very likeable and charming beings, naturally shy but very charismatic and skilled with social contact, they'd use their Fi+Ne to not only understand and sympathize with people, but also to win them over and to become the sweethearts of the group. They'd probably come across more as J types, or ENFPs.
INFP 4 - This is too... everyone knows that. Special snowflake syndrome, I am so unique, I am so dark, I am so original and artistic, nobody understands me, I am alone, I am too special for this world... the classic INFP 4 stuff.
INFP 5 - This would be by far the most introverted type of INFP. Logical and sentimental at the same, they would come across as mysterious and geeky. Probably would spend most of their time alone, doing research and learning. Feelings would be more analyzed than felt, but still would have strong impact on the individual. The most academic type of an INFP, needs both emotional and intellectual stimulation. Probably might hide their feelings alot out of fear of being vulnerable, they might even reject their feelings when unhealthy and then fall into emotional breakdowns.
This INFP would mostly come across as INTP and they would be the ones who would definitely mistype themselves as one.
INFP 6 - I think this type is not so rare for INFPs. They are less sentimental and goofy than other NFPs and more analytical and critical. They would have troubles with opening up emotionally, they need to check people out in order to feel safe around them. The most security oriented type of INFP, I can imagine this type to be a perfect homebuddy, someone who likes their safety and comfort and does not like to leave it. This INFP would also be a good trouble shooter and problemer solver, they would easily understand systems and learn about them.
If such INFP gain their trust to someone, you can count on them 100%. Never leaves a friend in troubles. If they find their calling, they can become passionate and hardworking.
INFP 7 - This INFP would most likely seem like Ne dominant. I imagine, their need for excitement and fun would be more in their head though. They would enjoy wild flights of fantasy, adventures in their mind never end. Probably very bohemian kind of this type, would enjoy fine things in their life. They might be escaping from their emotionality to the fantasies, or worse might use alcohol, drugs or other substances to escape from their deep feelings.
This INFP would probably feel in a conflict a lot. They might seek understanding and harmonious relationships, but also need freedom and adventure. They also strive to have both, security and support and individuality and open possibilities.
This INFP would probably love to travel, would be excited about getting to know new cultures, people and learning new ways of thinking.
I can imagine INFP 7 to be a successful journalist, cultural worker or travel agency worker.
INFP 8 - This... this is really the most conflictual type I can think of. This INFP would be very individualistic, strong and emotionally independent. Would fight fearlessly for what they believe is right. This type would probably enjoy creating an image of a "badass" persona to hide their emotions. I can imagine they would fear relationships as they might see them as a thread for their sentiments. Probably would be a lone-wolf kind of INFP, strong and passionate on the outside, but sentimental on the inside. Might have hard time to deal with their emotions, might even fight them or hate them. I think this INFP wouldn't like to be a classic leader type, but would hate to follow anyone. Rebels going their own way.
INFP 9 - This is not rare, actually type 9 fits Fi quite well and can be a good fit for many INFPs. This INFP would be very peaceful and conflict avoidant. Introverted, but seeks harmonious relationships with others, sometimes might find themselves in a conflict between adapting to others and adhering to their own values. Stubborn when threatened, but not aggressive. This INFP would be a perfect sponge for emotional atmosphere, malleable and soft, would attract strong and bossy people.
This type needs to built a firm ground for their ideals and values and to make sure others don't cross the line. INFP 9 can have problems with being too generous with their energy and time, because they don't want anyone to feel bad and wish everyone to feel welcomed. They need to be careful about adhering to what they believe is right unless they might find themselves in a circle of compromises and unfulfilled needs.