Thanks for asking @ScrollingLeaves
I can now see that I didn't reply to all the later replies I got on this thread, all of which were really helpful, so belated thanks to all posters!
The surgery went ok thanks. I was quite unwell for a few weeks afterwards, although I was at least at home. So DD had to accept my lack of participation in general day to day life, and especially bedtime, for a while.
I'm recovered from the surgery but now just back to my 'usual' chronic fatigue baseline, of just about being able to manage day to day, but struggling with every little cold that comes into the house, and there have been many!
DD is doing ok. She's 10.5 now, in year 5. She likes her y5 teacher, which helps with getting her to school. Bedtime is .... ok ish. We have just accepted and adjusted so that one of us, usually me, will body-double her from when it's time to stop whatever she is doing/watching, until she falls asleep. We managed, for a while at least, to substitute a big chunk of the tv-watching for audio-book listening whilst simultaneously doing some art and craft or other activity. We mostly now manage to avoid morning TV before school, which is great, as it was so hard to get her to leave the house if an episode of her programme was mid-way. She still watches too much tv but it's better. And she is mostly more accepting of the message that it's time to stop. We still have occasional blow-ups on that, but much less frequently.
And in general her emotional regulation seems to have improved overall. We still get occasional episodes of hitting, kicking, throwing, pushing, but so much less often than we did only a year ago when I posted this. I still sometimes get into petty squabbles with her, and then feel an idiot for being drawn in, but it's definitely less.
I still have to do so much for her though, keeping things low demand. I still get her clothes, help her dress and undress, get her toothbrush ready, wipe her bum sometimes, bring her a drink, pack her school bag, make her lunch box, remind her that it's swimming /own clothes/ whatever other special day at school, and if I forget the 50p charity donation or whatever, then it's totally all my fault. Rarely does she want to take any responsibility for doing or remembering anything, unless it's something that goes really well and then of course that's all down to her 😄
She is generally much more pleasant to be around. All the old issues remain, but less powerfully, less frequently, and she does spontaneously apologies or recognise she took things too far at least some of the time. Which is progress!
So I think a combination of continued low-demand and us attempting to co-regulate better, especially at bedtime, plus her own maturity and self-awareness developing, are finally paying off. I am concerned about puberty (which she's super-aware of and hyper-vigilant about any changes to her body) and about the move to secondary over the coming year or so. And she has started to have more frequent episodes of being 'sad for no reason' as she describes it. They are usually just one evening or day at a time, and we don't make a big deal of it, but I can see that her needs will be constantly evolving and that will keep us on our toes!
I hope things are ok with all you lovely posters and your families.