Yes it helps the GOP. Anything that lowers the stakes and importance of abortion as a topic is good for the GOP outside of deep red states.
Looking at elections and referendums since Dobbs, voter seem to have an understanding of how credible the threat to legal abortion is.
Democrats running in blue states didn't seem to get much if any benefit from running on abortions. I'm looking especially at NY and CA here. There was no credible threat to legal abortion in those states.
When there was a credible threat to abortion like in PA+WI Governor races or the WI SC race, dems got a clear boost.
Yeah I was just saying that there was no way the GOP can win on the abortion issue in say Michigan. If its done via a ballot referendum, it hurts them badly for one cycle (see 2022) but after that its pretty much a non-issue anymore. Every subsequent election doesn't become a de-facto referendum on abortion that the GOP loses 9/10 times.