Just notice the final lines from this article that comes from a left-wing news site:
"The former president and his wife Melania Trump did not appear in a public service announcement released on Thursday encouraging COVID-19 vaccinations and featuring all of the other living former U.S. presidents and their spouses."
Yes, I also find it interesting that Trump was happy to announce that Biden had already received his shot back. I think it was during his CPAC speech recently when he said that. Why would Trump support vaccines when he already beat the virus using a therapeutic cocktail?
I think if we consider his motive it makes more sense: make the controllavirus go away