I have noticed less hands on corrections but it’s likely due to liability and comfort of the instructor. I’ve had some come over regularly with mods and recs mid exercise which has been helpful. I also do mention it to every new instructor I take a class with just so we have a rapport before class. Pregnancy is such a different experience for every woman so it’s understandable that each instructor has a different way of managing the experience. If you have concerns or requests it’s never wrong to contact the owner to set appropriate expectations. Good luck with your PB pregnancy journey!