Taking the OP and the general ideas, if we're talking about convergent evolution of appearance, my guess is that evolution of human populations has probably had a lot of chance and contingency in it, and there's been lots of extinction of different human groups and probably lots of re-evolution of the same physical appearance. E.g. the Jomon and Ainu descendants are argued to share some physical characteristics (face shape, hair, etc.) with West Eurasian peoples that most East Asian people don't, even though we know they had no special relatedness between Western and Jomon at all).
If we were able to re-run Out of Africa prehistory multiple times, I wouldn't be totally surprised if we were at a medium level of differentiation in appearance, and there were outlier possible worlds with far more or less differentiation in appearance.
So it's not like it's totally ASB that in an ATL the founding groups moving into the Americas could be otherwise like in our world but just happen to look more like Europeans today and evolve to look closer to them as well.
But it seems like it's a possibility of limited interest to discuss? It's just appearance and mostly superficial. Maybe there would be less likely to be racism when the groups re-encounter each other (or there might not be at all, given how people can have strong racist ideas over small differences), but other than that.
If we're talking culturally about Indo-Europeans, and assuming the steppe hypothesis, then we'd probably need the survival of animals in the Americas that would allow for a pastoral economy to develop (possibly just the horse) or maybe just different domestication events on the animals that were there. But we've talked about that sort of thing already ready in other threads about that already!
As others discuss, there's a limit to this sort of thing; in some possible alt-world where people who looked kind of more like Europeans lived in the Americas, and developed a pastoral economy kind of more like is thought to exist for proto-Indo Europeans, and had a language that just happened to be kind of closer to IE, they still wouldn't actually be possible ever to be replicas of them.