Wits end with no sleep any advice ?

[Drsnow]

I really need some advice as I am at my wits end and exhausted
My soon to be EXH and I split up around 18 months ago and are both with new partners
DD7 didn't take the split well but with consistency and routine,she has managed to go back to being the fun loving happy child she was pre divorce and has a good relationship with ex and his new partner and me and my new partner.
However one thing that has not improved is her sleep.
During the initial separation she suffered terrible sleep regression,which was totally understandable. Initially she wouldn't go to bed on her own but with constant routine she managed to fall back into the habit of going to sleep independently.
The issue is she wakes up anywhere between 9.30pm and 1.30 am. I put her back to bed usually and she drifts back off however by the second time I'm exhausted and worried about work the next day ( school teacher).
By this point I usually give in and let her into bed with me . I'm awake now as she has awoken after my second attempt and has gotten into bed with me . I wouldn't mind but I literally get no sleep when she is in with me as she lies on top of me so I end up uncomfortable and awake throughout the night .
I've even been to a GP and had external support all who have said I have a good routine - bed and usually asleep by 8pm story ,shower ,little massage if anxious etc and can't tlgive me any advice.
This has been going on for around a year has anyone got some suggestions that would enable her to sleep through the night?
TIA.

As someone who is often awake early morning so I feel for you.

Would she sleep on a mattress on your bedroom floor? Obviously that would not be a long term solution but would let you get some sleep.

What happens when she sees her dad?

Could she do something quietly instead of coming in to you? A torch and a reading book?

Try putting her to bed later ?
Straight back to bed when she wakes and keep repeating. You just need to break the habit. Consistency is key. Return return return. Hard when your knackered but that's the way to crack it.

@whyhavetheygotsomany ive tried it past 8.30 there's a meltdown and she doesn't sleep anyway

sorry but some people just sleep like that. I was well into my 40s before I stopped waking regularly in the night, and she is obviously a child who has perfectly normal natural fears about being alone. so there may well be nothing you can do about it for the time being. I agree a mattress on your floor might help - maybe once she is asleep in your bed you could move to the floor?