What POD are we going with? Biden picking someone else as his "token wokie sidekick" running mate? Biden not dying of that sudden aneurysm? Or Trump winning in 2020?
Because those are just massively different scenarios. You can't just assume a blanket "anyone else" in charge, because it matters who else is in charge. If Tlaib is still VP, she's either a huge embarassment to the administration, or used deliberately as a lightning rob. (That is: they let her bleat on about the poor Pallies, while Biden goes on supporting Israel.) If she's never VP and Biden picks someone else who is at least moderately less insane, stupid and evil as his VP, it's just business as usual: the administration supports Israel in practice, but calls for peace and negotiation. Condemnation of war crimes, support for humanitarian aid. The usual.
Now, if Trump is in charge, it's another story. He could go for any kind of wild scheme: from personally stepping to try "the art of the deal", to full US support for Israeli annexation of Gaza & expulsion of the Palestinians. It's way more of a wild card.
However, any of the above would be infinutely better than having this cursed President-by-accident who has the shameless gall to call child-burning, mass-raping, genocidal terrorists "the victims", all while blaming the actual victims as "apartheid criminals" who are simply receiving "understandable backlash after decades of borderline fascism".
If anything, though... she's made certain that we will get to see how Trump eventually handles the matter, after the next election. Have you seen the latest polls? It's impossible for him to lose, now.