Thank you. Yeah I did know that. For my use case it unfortunately is too clunky and it does not have headphone remote (afaik), but I really considered buying one, just in case it gets added.
In Android, headphone remote works out of the box... that's why I would like to use one. There is the HiBy M300, which in my opinion would be worth having a custom rom :-) Indeed there seems to be efforts.
https://www.crowdsupply.com/cool-tech-zone/tangara