it might be a emulator. such as exagear. which only need a minimal linux environment to proot into. and all gui are done by wine
ebd6a8c9051028dc1607
do you have the required module installed?
afaik gain control sysfs is not a part of vanilla linux kernel. so you may need to port some patch from elementalx kernel, rather than just simply enable some kernel config
have you tried edit /system/vendor/etc/mixer_paths.xml
file ? it may include volume and gain config
im already using archlinux arm on my phone for some years. there is really nothing i need to degoogle at now. the only google product im using is gmail (3rd part client) and play games (run in waydroid).
i think these video may explained it
https://www.youtube.com/watch?v=4XNvnKDSoEw
https://www.youtube.com/watch?v=tD5Dd6VDr7c
https://www.youtube.com/watch?v=qZHoIS-10GQ
the point of 4k is that you can make ui smaller and show more things
gesture navigation is fine for me. but i more want stacking recent tasks back
i suggest to use a open source front end (such as newpipe). and use adayaw (a hosts based ad blocker) for the generic ads
thats why i always run close source software in bwrap. not only cracked games.