If I am worried about side effects from facial contouring surgery, what should I ask during the consultation?

I looked up side effects of facial contouring surgery and I'm scared because there are a lot of reports about sagging and decreased sensation.

I want to refine my facial lines, but since it's bone surgery, I can't make a decision easily.

Do side effects of facial contouring surgery vary significantly depending on the scope of the surgery and the amount of tissue removed?

I should probably check during the consultation to see if they accurately explain the location of nerve lines and only the necessary areas.

If I'm worried about side effects, what should I check most when choosing a hospital?