SPOILER BAN LIFTED A WEEK AGO..


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So Sharon Carter never shows up in this film, after a few movies setting up a potential relationship between her and Steve.
(I guess considering how everything goes down, that might have been a bit ... awkward.)

Related to this, as far as the time-jumping stuff goes, it sounds like the writers didn't understand it either. They made it really clear (well, clear as mud) that changing the past doesn't change the present...?) Yet, when Steve goes back and lives through his life again, he doesn't live that out in an alternate reality; he ages in and appears in the same reality that he left despite time traveling and living a different life that should have made an alternate branch.

Avengers: Endgame Writers Confirm Identity of Peggy Carter's Husband

Some fans have tried to give the writers a pass by making excuses, and then they admitted that they actually DID mean that the nameless husband Peggy describes to "now Steve" was, well, Steve.

Which means Steve is really Uncle Steve, to Sharon Carter. But... how wouldn't she know... when dating... but I guess they never started to date...? And... I'm confused.

Anyway, it's why I'm not fond of this kind of time travel stuff. It kills the emotional content and muddies the plotting.

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And I think I mentioned before, but it looks most probable that Tony grabbed the stones via his shifting / nanotech suit. I just wish they had set it up a bit more carefully previously in the film, where Tony incorporates something on the fly into his suit. We did see the hand resizing for the Hulk and for Thanos, but I think it would have been simple enough to insert a quick moment in plot where the suit adjusts on the fly to incorporate something outside itself or moves stuff from another suit to Tony's. It would have justified this as the "power move." You'll see this happen in other films where the writers/director thought it all out, they set up examples to justify/explain a later plot point.