COVID has been added to the regular schedule of vaccines (that Hep-B, MMR, Polio and Tetnus are a part of) so I don't see it getting removed for AOS requirement. They've basically classed it as mandatory and expected. Obv people can refuse to get their kids vaccinated with MMR etc but an immigrant can't unless they manage to get a waiver. People equating it being dropped from travel req with immigration are equating completely different risk assessments.
The US wants tourists and to allow families to visit each other, they do not care about immigrants. As vaccines are not required for non-immigrant, this spares workers needing it so wont' affect visas related to economy.
Tl;dr: it is *highly* unlikely COVID is being removed any time soon as it sits in the same class as MMR, Hep-b, polio and tetnus which are required of immigrants. As far as I can see the immigration vaccine list = the routine vaccine schedule list.
source: https://www.cdc.gov/vaccines/schedules/hcp/imz/child-adolescent.html