Had trouble with this myself teaching. Students this semester have been good about it (probably because I've been very explicit in my contempt and also it kept blundering) but last semester was tricky.
One thing I learned was I need to also insist no Grammarly. That used to be allowed but it makes original writing sound very AI. I also riddled my assignments with short oral segments and personal stories.
It cuts into class time but I've managed to make those sessions educational since my "presentations" are always conversations w/ students. No ppts. Actually kinda fun and very much weeds out cheaters lol