I remember when Russia did go in, briefly Fox News was full of editorializing that Russia should get to have Ukraine. They at least tried to got full on pro-Russia when they thought the narrative might fly and Ukraine was going to just get conquered in a week or so. Clearly they were trying to set things up for blithe acceptance for what Russia had done and for the world to move on (until next time).
I think that between the prolonged conflict and the fact that their boomer audience actually may still be inclined to remember their cold war feelings that this won't fly, that they backed off to less aggressively calling for complete Russian victory. But as seen here, there's still a theme of making it clear that you're ok with whatever outcome, leaning toward "but should we spend our money?" to undermine things rather than calling for a pro-russia outcome outright.
I wonder if a big part of the reason is just the whole phone call about Biden and subsequent impeachment, and how Zelenskyy wouldn’t play ball and the whole thing damaged Trump’s ego in a big way. So even if it’s politically advantageous in every way to say you want Ukraine to win, Trump is incapable of doing so.