Spouse of a patient here...just my two cents, for what its worth...
Staples:
I asked my husbands surgeon about staples because we travel fairly frequently (at least we did pre-COVID) and I was concerned he'd set off the scanners. She advised that there weren't any internally. The only staples used were on his incision which occurred because there was too much scar tissue to work laparoscopic. I wonder if the connection type (pouch to anus) used depends on the surgeon?
Holding:
He was told to practice "holding" to stretch the pouch over time. This was advised by the surgeon, her assistant, and several support group patients. I wonder if its a locality thing and what information has reached where. We're in So Cal.
Talking with your surgeon and gastroenterologist should produce better and more accurate answers.
Now for my two cents not just as a spouse but also as a patient advocate...my opinion is ask, ask, ask. This is the motto I stand by regardless of the health issue. Don't be afraid you're making the doctor uncomfortable discussing. It's their job to guide their patients and you are paying them to guide you in your health which includes life after surgery.
Lots of love, T