Hi
I installed Openwrt a year ago on my AX6, and the wifi performance was really bad compared to stock rom.
Wifi strength was about half compared to rom stock...
People said it because the drivers are not improved enough..
Now there is "Official" openwrt for AX6.
That means the Wifi signal will be as good as stock rom?
How official openwrt is different than unofficial openwrt?
If there have been no changes to driver software/your device, behaviour between "unofficial" (I guess you mean release candidates) and "official" (I guess you mean stable release) might be the same. But you should upgrade anyways, the stable versions are called stable for a reason.