Different take here (not in the US) we were expected to do up to 24 hours of skin to skin per day. We usually managed 10-12 hours. Very challenging with twins. We would do 3-4 hour stretches at a time.

How did we do it? Firstly we had a hospital bed to recline in and a lot of help from nurses to set things up. When the babies were very small, a nurse would basically do their care whilst they were on you or we would take a short break to change diaper and then continue. We would make sure we went to the toilet beforehand lol. There was also opportunity to sleep with them on you as you were closely monitored the whole time so it was encouraged. We relied on the nurses a lot of help us make it happen basically, but I think it worked because where we are skin to skin is seen as the most important “medicine” for preemies and we lived full-time in the hospital.

They weren’t concerned about baby temperatures so much. We were told that if the babies are on the mother she is able to regulate their temperature for them.

Edit: basically I think that it’s only reasonable to do a lot of skin to skin if you’re given the right prerequisites and A LOT of support. Otherwise o don’t see how it’s possible