In regency times when someone would convalesce at someone else's house or at an inn, especially if that included them being unconscious for some amount of time....how did they handle that person's bladder and bowel stuff? Was that just considered a normal part of care from the woman of the house and her servants, like were they taught linen changes the way nurses are today? Or were they all left to just figure it out once it happened do you think?
The thing with being unconscious for a long time is...you're not really going to be eating and drinking much. Like they might wet your lips to try to hydrate you, but they won't risk you choking on anything more, and don't have ways of giving nutrition by other means that we have today, so normal bowel and bladder function would cease pretty rapidly, and at that point you've got bigger problems than what happens if you wet the bed, like you're gonna be dead soon.
Housekeepers and servants would definitely have a handle on changing bedlinens and maybe absorbent padding for invalids with bowel-control issues, (or say for people who have given birth/having post-partum bleeding or other uterine discharge issues while bedridden,) but they'd probably have some kind of bedpans or focus on getting someone up and moving enough to at least get onto a chamber pot ASAP.
I'll be honest, I work in healthcare and when it comes to incontinence, if you're not keeping someone clean and dry and repositioned while they're also bedridden, you're very quickly going to get bedsores, and if THOSE aren't kept clean, you're going to get an infection, and again, in the Regency era, you're very soon not going to have to worry about long-term incontinence in a bed.
Back then, if you largely stop moving/pooping/drinking on your own, you're going to be very dead very soon.