Regarding the disagreement between bishops:
Vatican Warns U.S. Bishops About Denying Communion To Biden And Other Catholic Pro-Abortion Politicians
Among the leaders of the campaign to rebuke Biden is Archbishop Salvatore Cordileone of San Francisco, who recently issued a pastoral letter arguing that Catholic politicians who support abortion rights should not receive Communion. A few days later, Bishop Robert McElroy of San Diego published an essay opposing that, saying such an initiative "will bring tremendously destructive consequences."
And:
Father Thomas Reese, a Jesuit Catholic priest and senior analyst at the Religion News Service, told CBN News the bishops are very unhappy with President Biden's position on abortion, but the whole communion question is something else entirely.
"The bishops' conference that meets in June has absolutely no authority to tell President Biden that he cannot go to Communion," Reese said. "Under canon law, they do not have that authority."
"The only person that has authority over who goes to communion in his diocese is the local bishop," Reese explained. "So for Washington, D.C., that is Cardinal Wilton Gregory who has made clear that he is going to allow President Biden to go to Communion."