One of the problems was that the Whigs didn't want to expand the power of the Church, so it's unlikely to happen on their watch.
Another problem was that the New England colonies (in particular) were afraid that bishops coming over would be part of a process of imposing an Established (Anglican) Church in the colonies. If it were made completely clear that one bishop was appointed for the Established Church of Virginia, and another one or two were appointed as NON-Established bishops to care for the Anglicans in areas where the Anglican church wasn't Established, then I suspect it would go over better.
I have a PoD - Queen Anne (who was quite supportive of the Church) hears John Wesley (probably has him summoned to the palace) and is impressed. She tells the hierarchy (of which she is, after all, the nominal head) that this godly man should be made a bishop. The CofE, viewing him as an unwelcome gadfly, promotes him sideways - ordains him bishop, and sends him off to the colonies with no money or staff or Established authority to be bishop over New England, New York and the midAtlantic colonies. Quite possibly they send someone else (more in political favour) to head the Church in Virginia.