I'm so glad you got this done AND that she's doing well. You & your vet are right to worry some about her skin healing, but with you keeping an eye on things, she'll probably be fine.
I'm glad you fed her more before the surgery- that was a wise decision. :gj:
I've had a couple snakes over the years like this- that keep churning out eggs. It's awfully hard on them, & on us -worrying about egg-binding potential, especially as they age.
I had one snake "spayed" many years ago (not for the same reason- she had an ectopic pregnancy- no way to pass the stuck egg) & she was fine- thanks to a very skilled & caring vet.
In later years, I was not living near a vet I could trust to do this, so I "lived with" the yearly egg-issue.