The potential to split MAGA was there with the abortion issue. Most of USA is now pro-choice.
Tulsi Gabbard, RFK Jr, etc I'm sure that they are all pro-choice. But they realize that ultimately it is a states' rights issue and there are more important things that we should focus on.
Abortion has been decided recently so the SCOTUS decision will stay. Gay marriage, however, was decided more than a decade ago and I read there’s an effort to overturned it.