Please let me to know if you're still interested on some custom ROMs like LineageOS or AOSP/Pixel Experience for Huawei MediaPad M3 8.4 !
If there will be enough users which still use this tablet maybe I can try to make some custom ROMs here too
Please reply with a message like this :
Yes, I'm still interested : My device BTV-W09
This was just an example !
Thank you very much for your attention.