When building from master, I see two versions for the U6-LR AP target...
Ubiquiti UniFi 6 LR
Ubiquiti UniFi 6 LR U-Boot mod
The "u-boot mod" version, from which limited docs I have found, apparently uses OpenWrt's u-boot and allows use of current ARM Trusted Firmware.
Is this firmware build directly flashable to a stock U6-LR using the normal kernel mtd write method, or does something need to happen before that (changes via serial port, etc)? Anyone know?