I just updated my findings for this on the [TRACKING] Linux battery life tuning - #82 by D.H thread.
TL;DL, EndeavourOS + tlp+ PSR manually turned on gives very good idle, light web browsing, etc usage, maybe 8-10 hours, maybe more. I’d still like to improve video playback longevity a bit, but 6-7 hours of samba streaming 720p is not too bad. Powersave on AX210 card is a must.