Some people develop floaters after undergoing LASIK. I don't know if the laser somehow induces the vitreous liquefaction or the cornea reshaping made the patient can see more clearly the existing floaters.

Yes, you can go for LASIK after FOV.

I think if your eye have undergone PVD induced FOV, it would be safer to do a LASIK. But if you undergo LASIK first, it might made your eye floaters getting worse.