Other than
https://github.com/koreader/koreader/pull/3372 which I added just so it would hopefully display something, there isn't any development without people like you who have the device.
A big one to try might be this one.
Code:
touch_alyssum_protocol = true,
That's in frontend/device/kobo/device.lua as part of the KoboSnow (H2O2) definition.