My son is 9 and just a few months ago wanted me no where near him in the tub or shower. Lol. Normal I guess as he becomes super aware of his body and his mom seeing his body.
My daughter would go everywhere naked so that's not an issue. She's 7. She has mostly been washing herself for a year now... Since kinder, but I check her before she gets out. Make sure she's rinsed and got her face and feet. My son handles, but ill check on him ever 5 minutes and remind him to rinse clear, get the hiney crack good and face and feet.
We are in an apartment so I'm ear shot away if needed and doors can be closed to a crack bit all the way and never locked.