Basically every halfway modern SBC will work unless it is very exotic. I’m running Klipper on a RPi 3b and on an OrangePi 3 LTS.
Issues you might be experiencing is not from the SBC but from the Linux distribution running on it. Unlike Raspberry, all of them have only a small community and often the distributions provided by the manufacturers are crap. E.g. on my OPi the WiFi sooner or later crashes forcing a reboot. Luckily I can run it via ethernet, which is stable.
What kind of topics to be expected is hard to tell but most likely:
- Stability
- GPIO support
- I2C support
- SPI support
The last 3 items can easily be worked around by using a Raspberry Pi Pico, which is rock solidly supported by Klipper.
In doubt, I would at least choose an alternative that has an active maintainer in the armbian community.