As the title suggests, I’m looking for the Android 15 PAC file for the European market. Any help would be appreciated 
SN: JH10XpAB50240106229
I don’t think that file alone will fix it.
I think you need to reinstall the entire system.
You should contact Chuwi support: service@chuwi.com
I don´t want to fix anything. I just want to update from 14 to 15 as i´ve done with a android 14 pac file from here. Support tells me there are no files. Of Course… but selling that device with android 15. congrats. An android 15 pac is also here but for ROW 
Support and updates for Android devices have a limited duration, determined by the manufacturer.
If your tablet is more than two or three years old, it may have reached the end of its update cycle.