Eh, Trump's pretty reliable when it comes to optics. It's not always traditional (see speaking style) but did you really think he'd turn down an opportunity to boast about his accomplishments? He was banging on about Warp Speed and how it was going to save "millions" of lives even last year during the debates...it's in his self-interest even without any plausible financial incentive.

Also, his base is Republican and unlike rabid Democrats, a fair bit of "conservatives" are pro-vaccine and condescending faggots that will say it's a matter of "life" and "above politics". I don't like either party, with the Democrats the least favorite, but at least they're willfully, brainlessly loyal to the donkey's hoof even as it's been plunged down their throats.

So while it's a partisan topic, the right-wing base is far more fickle.