13 months old refusing to sleep

Have you tried edging towards one nap days to see if that helps?
It’s probably just a phase, I know that’s annoying 😭

I have the same but my son is still having 2 naps a day and still seems tired 🙈 so opposite to you but the 4am wake ups are not nice!
I’ve been keeping it’s dark and quiet, giving him a cuddle and putting him back down to try and get out of the habit 🤷🏼‍♀️

What does your usual routine look like? And what are their wake windows in the day and before bed? It could be an overtired issue if they aren’t getting enough day time sleep x

she wakes at 5.30/6.
First nap 9/9.30, for half an hour. Then second nap 13.00 for hour or hour and half . Then bed at 6.30/ 7.

what time is the second nap? And how many hours is the wake window before bed?
I would cap the second nap so wakes no later than 2:45/3pm. Then a good 4 hours before bed.
Mine was doing the exact same as yours.
First nap at 9:30 (wakes at 6:30/7), cap that so sleeps no later than 10:45.
Second nap around 1:30/1:45 but cap to sleep until 2:45/3.
Bed time for 7, sometimes 6:45 or 6:30 depending how well they slept in the day. Sometimes mine will only do 40 mins for first or second nap. So whatever time they wake from the second nap, bed time is 4 hours after this time.
It doesn’t work overnight but keeping consistent will help their cardiac rhythm. Also when they wake, if they’re not crying or upset, try to leave them in the cot. Again this is teaching them it isn’t time to get up for the day x

thanks .
We already do 9.30 nap for half and /45mins in am.

Then next nap is an hour or hour and half long .

We are thinking could it be she’s ready for just 1 nap.