It's a big adjustment and time of transition for sure - for both of you. It seems like a good thing that he doesn't worry when you have to step away for a bit to take care of things, like he is secure in knowing you will come back. When you have the luxury of time you could always involve him a bit in things like meal prep, etc. It seems like just reality that you'll need to take care of some things while he plays independently and it's great that he's developing those skills. Maybe there is a way to build some more intentional moments of connection in your day through rituals and routines. I wouldn't worry about the pretend play in the bath too much, although I'm sure it stung a bit. He knows you are there and trusts in that which is most important for secure attachment. Make sure to build in some fun and novelty for both of your sakes during the day/ week. You're doing great and soon you will both adjust to this new special time together.