I got my Orange Pi 5 out of the drawer today and discovered that it would not boot from NVMe after armbian-install if I used btrfs, but it boots fine with ext4. I tried both the Minimal/IOT Ubuntu 24.04 and 25.11.1 Trixie Minimal/IOT images with 6.1.x kernels. (I updated each to 25.11.2 before doing the armbian-install of both the system and the mtd image.)
P.S. A minor quibble, but it was annoying that the numbering of the continents/countries during setup and the ordering of the SPI bootloader options during armbian-install were different between the Trixie and Noble images. I had to actually read. 🙈