No sauce because this is pure speculation…
What if:
The same people who planned the release of COVID19 now see how Joe Xiden is botching his administration's response to the pandemic (big duh, based on his botched handling of H1N1 during the Obummer years). Xiden tries to mandate vaccine use, which predictably bombs on Constitutional grounds. Joe's favorables tank even further.
They engineer the Omicron variant to be more contagious, but exhibit less severe symptoms in order to force herd immunity on the world population at large (especially the unvaxxed).
They release the variant in Africa in order to disguise the true origin of the variant (Wuhan, of course!). Once Omicron surpasses all the other variants and effective herd immunity is reached, they hope Xiden's numbers will recover enough to give him the political cover to preside over the implementation of their actual agenda.