Reply to Jme
It sounds like you have almost exactly the same wound I had post-surgery last year. Perineum all sewed up, but a 10cm deep hole that needed healing and keeping clean, so I was on a vac in hospital for a good few weeks before I was released home with a portable unit.
Not gonna lie, it was a total pain. Because of the location, there was just not a way to keep the area still, and even lying in bed for a few weeks I was constantly getting alarms due to broken seals, then having to call in district nurses every couple of days to change the whole thing. Only problem, they had little to zero experience of dealing with the vac, and especially applying the dressings with a view to getting a seal that would last more than a day, or even a few hours.
Turns out having fulsome young ladies stopping by frequently to rummage around my undercarriage was not as sexy as one would hope...
Anyway. The good news for me, and hopefully for you, is that the worst of the wound did heal very quickly (lots of protein in my diet to help the process), and within a month I was cleared to lose the dratted vac and to look after myself - plenty of sterile gauze, antiseptic creams, saline solution etc. Had a week or so of wearing incontinence pants, just for confidence when finally venturing forth outside.
Had all the surgeries over March/April 2021 and back at work (taking it very easy) at the beginning of July.
Hang on in there, it does get better!