Hey OP, I would absolutely keep your DD at home until after Christmas. As PP have said, schools encourage children to be brought into school almost no matter what because they have targets to meet around attendance (I was a school governor).
However, in your position, I would also be questioning the longer term plans. If the consultant has suggested to you that school might not be the best option for your DD, I would take that seriously.
Our circumstances are very different to yours. I have twins, DS and DD, and they're both autistic. DS has high needs and won't ever be independent. DD is 50/50 - I'm not sure whether she'll ever be able to work (she has associated conditions which make processing and speech difficult).
Both DS and DD were in school until COVID lockdown. DS was in a special unit. DD was starting to fail in mainstream but would have had to continue to secondary school in mainstream and had to fail on a much more dramatic scale for the LA to consider any kind of alternative provision. Autistic girls tend to fly under the radar, even after diagnosis.
Anyway, a very long story short - they were like different children during lockdown. With the difficulties of school removed, they really blossomed. It brought it home to me how hard school was for them, just to get through every day, and how much effort it was taking for very little long-term benefit.
So they never returned. They were in Y5 when lockdown started and we've home educated ever since. And it was the best decision I ever made. They are so much happier, calmer, and more resilient - as it's not taking all their energy just to cope with a difficult environment, they're able to learn much more effectively.
If your DD is happy to be home educated, and you think you can manage, I would be very tempted to try. If your DD's consultant is suggesting that the risk and impact on your DD is simply not worth it, I think I'd be seeing how I could make the life change.
I never dreamt I would home educate but it's been a wonderful change for us as a family, and made my DC"s quality of life so much better.