When can I go onto 1 nap?

We’re at 10 months. I’d like to be on 1 nap but not sure if we can just do it.

Right now on 2- our wake windows are like 3/3.25-3.5/4-4.5

Wake is around 7am. First nap is at 10. I let baby go to 1.5 h but lately baby wakes up after an 1-1.25 h. Then the second nap I have around 2:45 pm. This nap also ranges from 35 min-1 hr. I’ll cap it at 1 hr.

Bed is at 745 and baby falls asleep then or around 8.

Just wondering if we could somehow swing 1 nap- baby does seem ok with long wake windows.

Also how would I decide when to make the nap and bed and wake time?