I've worked with home-schooled kids ("good" ones, with parent invested in their education). I don't know if the program still exist, but we had satisfied parents and good results, and i think now the experiences we made are available with manuals for the parents: https://www.lespetitsdebrouillards.org. (i was in Loire-atlantique at the time)(i just looked at it and it seems less science-focused than it was).

At the time we only heard issue with science programs (bio, PC), and maybe it was a bias as "les petits debrouillards" are a club focused on science experiments, but we've heard that the CNED program on those subjects were not engaging enough for the children (again, could be a sample bias). I guess now it might be easier to find engaging resources on those subjects, but still, don't hesitate to take a look at this club.

Also, if your daughter have issues with mathematics, wolfram Alpha is an amazing support to teach her, my sister did not do any kind of math since 2016, and was quite bad at it in school, i taught her enough in less than two weekends for her to validate her first semester of college (Basics + Complex numbers the first weekend, derivation, integration and function analysis the second one).

Good luck, school is supposed to support parents, but if you can't trust them with your child, it is worse than useless.