The Epley manoeuvre itself is a positioning exercise, so on one hand it does not involve any medication or invasive procedure, which sounds reassuring. On the other hand, certain positions involved can be uncomfortable or potentially not ideal during pregnancy, especially in the later trimesters. Since there is no clear community experience to draw from here, I would really suggest bringing this up with your gynae or a doctor before trying it on your own, just to get the green light first. They can assess where you are in the pregnancy and guide you on whether it is safe to proceed or if there is a safer alternative for the vertigo.