+1
The level-up screen takes us back to the character creator (albeit without the appearance customisation) so I'm sure they could do it. I'm an avid appearance customiser and like to make multiple characters so I can have lots of different aesthetics on the go, so I'm always an advocate of mid-game customisation. I see no reason why games shouldn't let you tbh, mirrors are a thing so why would our characters never want to use them? Especially in a game with so much roleplaying, if I wanna play a vain noble obsessed with her appearance who changes her hairstyle every day, I should be able to.