You can grab one of the latest images on the dedicated page here:
https://www.armbian.com/orangepi-5-max/
I have only tested the (community supported) minimal version briefly on my OPI5Max and for me everything works EXCEPT WiFi and BT.
WiFi used to work on 25.5.0-trunk.256 but on all the current trunks (301, 334) its dead.