Except that's not what it means in practice. The isolation doesn't mean "Not meddling in other countries affairs", it means "continue profiting off of other people's suffering, but also keeping the yucky foreigners out". Just look at Switzerland, Sweden, Finland.
It is important to remember that the right, and even the extreme right specifically, are not unified. Overgeneralizing is possible because many rightists have various, frequently incompatible proposals for achieving their long‐term goals. Don’t be too shocked to see a handful of neofascists opposing the NATO (at least in its current form).
Just like those that came before them, this resurgent brand of America First anti-interventionism is accompanied by the impetus to dismantle public spending and social services, as well as a vicious form of anti-immigrant nationalism. And ending the war in Ukraine is only a concern insofar as it allows them to fully direct all of the U.S. government’s resources toward a military confrontation with China — their top priority.
Likewise, remember that right‐wing goals bearing superficial resemblances to left‐wing ones still serve very different purposes. A few centrists may think that they’re being clever for pointing out a superficial similarity between us and the isolationist right, but they fail to properly analyse the situation (as usual) and overlook other policies that are closely tied to another policy.