Did you ever get this sorted as I have it running on a OrangePi 4 running armbian, followed by klipper installation via KIAUH installer.
I did go through downloading several libraries to trick the software into thinking it was running on a Rpi,( WiringPi and OPi.GPIO, but they didnt help).
The missing piece was SPI-DEV , heres a useful installation Guide for armbian :- Orange Pi I2C & SPI Setup (Orange Pi I2C & SPI Setup | neonaut)
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