Surveys pretty consistently show that European solidarity is very widely supported by a solid majority and the economic base of the EU is solid despite what some infinite growth pundits like to claim.
The main challenge will be get rid of our own home grown right-wing populists like Orban etc. and avoid getting divided over the support for Ukraine.
The US will be mainly occupied with itself in the coming years, and while we will certainly get to feel some negative fallout from that, it will primarily be a problem for US citizens and I really wish them all the best to get through this somehow.