When do you think is the right age for a child to start showering/bathing alone

maria

I’m not sure this is controversial but I’m just curious because my sister who is 11 recently started showering on her own and I feel like that’s a bit late

My sister was kinda little for her age but before my sis started showering on her own my mom just used to check on her to make sure she washed her hair properly and handed her the towel she didn’t fully bathe her