1 and 3 yr old schedule help

I feel like I am missing something for my kiddos schedule specifically for naps and bedtime.

Right now my 1 yr old naps at 11:30-1:30

My 3 yr old does as well

1 yr old goes to bed between 7-7:30 and wakes at like 6/6:30

My 3 yr old will start her bedtime routine 7:30-7:45 and is usually asleep by 8:30

My 3 yr old how ever will only be woken up by her brother at 6 if she’s in her own bed while if she’s in our bed she will sleep till 9am

I feel like she’s loosing out on good sleep because of his early waking and I am just at a loss on what to adjust.