Aside from lifting sanctions, I'm not sure what mechanisms are even politically achievable for Trump here. He's on his way to being an autocrat but isn't there yet. Not to the point where directly aiding Russia financially is something he could get away with. So, I don't think a big ass e-transfer from Donnie is on it's way in the near future.
imo the likeliest bad outcome here is Donnie announces that he's reached a deal with Putin that is basically everything from Putin's original demands list (no Nato, no EU, no zelensky with immediate elections to replace him with a moscow friendly puppet, a bunch of land ceded that they haven't actually won in Zap and Kharkiv oblasts, etc) but with a bunch of American repayment demands/reparations thrown in there. Zelensky pisses on the deal and Don uses that as an excuse to cancel all aid, lift all sanctions on Russia, threaten the EU with tariffs if they aid Ukraine, etc.
Not so much "direct" aid to Russia, but an obvious attempt to force a re organization of the board where Ukraine is actually by itself with no help and locked in a room with Russia and only Russia.
It won't go down that way (I don't see the EU/UK abandoning Ukraine, they know this is existential to Europe), but that's the way Putin is drawing it up.