So frustrated with ever waking 7 month old

[Paperyfish]

Had dinner at half five ( plenty)
Had 7oz bottle at 7 and 5 ml calpol as has recently cut some teeth ( is just in case tbh hasn’t shown any teething distress all day)
Asleep by 7:15. Awoke at 8:05 and had been screaming her head if ever since.
So…
Yes, comfortable temperature room
Yes, appropriate clothing and bedding
Yes, white noise
Yes, darkened quiet room
Yes, bedtime routine followed
Yes, had her naps today
Yes, she can self settle- does so for naps.
Yes, I have tried picking her up to comfort her
No, hasn’t got a dirty nappy ( checked)
No, doesn’t have a temperature or obvious illness
No, not hungry
No, isn’t in pain ( calpol)
She does this long tantrum at least once every night. Am so fed up of it. It’s like she’s willing her self to do it. At the stage I am starting to think she just enjoys it.
I’m not really expected any responses- but I am so fed up and tired. I just wanted to spend a hour or two with my older kids- but instead I am stuck listening to the hell chorus from a demon baby. I can hear her from every room in the flat so cry it out isn’t any better as I can still hear her.

What's her sleep schedule?

Wake 7
Nap 10- 11.30
Nap 2.30- 3.30
Some times extra 30 min cat nap before bed if needed

Any new developments?
They can knock sleep to shit

Sleep regression? She’s waking after her first sleep cycle. Babies that age can’t manipulate you, as frustrating as their behaviour feels!! Can you just bring her back downstairs for half an hour and then try again? I think my DS went through a similar period of waking 30mins after bed at maybe 8months. It’s exhausting but it does pass.

I might try reducing the last wake window. Waking shortly after bedtime can mean overtiredness. Waking at 3.30 from nap and not asleep til 7.15 is a huge nearly 4 hour window before bed - huge for a 7 month old. My 12 month old does a 4h wake window before bed. I know there are so many variables and so many things to try but I wouldn't go over 3h 15m of wake time before bed at that age. Good luck!

From what I was always advised the first awake window should be 2 hours.... Have you tried putting lo down at 9am? Then can fit in 3 naps bit easier? 9 - 10/1030am 1230/1pm - 2/230 then cat nap 430pm ish?

I agree think 4 hours awake time for bed ia quite long. I would say overtired.