Is the SPI bus available on the AML-S805x-AC (La Frite) GPI header? The pinout spreadsheet mentions “SPI” on the pins used by other boards, bus the signal names don’t seem to be complete.
On Armbian bookworm there is no SPI device tree overlay available to enable, and the only SPI bus in the kernel only has a single slave with a NOR flash attached.
Use official images and wiring tool. Armbian is community supported distribution so it doesn’t have any tailored hardware tooling.