Apple Music Family Sharing - Main AppleID used instead of daughters Music invite - how to now split them out.

Hello everyone - this is actually my first post, as I can normally fix most things Apple, but struggling on this one...

I have used Apple products for over 25 years, had the first iPhone and when my kids where old enough, they were introduced to iPad's and iPhone's. Initially they were all connected to my AppleID, for many reasons but safety and security was the main one. Later when Apple introduced family sharing etc (which, you will all know had its fair share of teething problems), which is one of the reasons I didn't adopt it straight away....

When I finally did, I sent the 'family' invites out to my wife and kids, but my daughter (for whatever reason), didn't use the invite but continued to use the main AppleID (my AppleID). At the time, I didn't really sweat it, as she only really used here phone to keep in touch with us, watch YouTube videos, and play games....

Roll on a number of years, and she now is a teenager, uses the device almost 24 hours a day (like most kids her age), but she has also found a love of music.... To the point where she wakes up and her AirPods go in, and they dont get put back in their case till she is then ready to go asleep.

I am 30 years older than my daughter, and whilst a small part of our music taste is similar, the rest of the time that's not the case.... So I have lived with the issue for a number of years, but I'm now at the point where I just want it sorted, I want my own music, my own playlists, and not have my daughters eclectic music taste dominating my Apple ecosystem....

My daughter is refusing to log out and login using the family sharing invite as she will lose all of her music, her playlists etc... And to be honest, I get where she is coming from, I dont really have playlists, I download the music I like, and will listen to full albums rather than a playlist of 50 songs from different artists and albums....

I need to maintain control of my Apple account, so I can't really invite myself to family sharing using a different email account, and leave my daughter using the main AppleID. I tried to back up her device locally on my MacPro, to restore her playlists back onto her iPhone, but having logged her into her own AppleID (which I used for the family sharing invite), but it refuses to do it saying I can't share the music with a different AppleID.....

So, the challenge to the community, is how do I switch my daughters iPhone from using my AppleID (for Apple Music), to her own AppleID, and at the same time transfer her Apple Music 'profile', songs, playlists, favorites etc... to her account, so she doesn't lose everything and have to start from scratch...?

She has close to two thousand different artists music that she has added into Apple Music, I have about 40 different artists, so it is much easier for me to start from scratch and re-add, than it is for her.

Any help will be infinitely appreciated.