Saitek seem to have released some drivers to make their panels etc. work with FS 2020. https://support.logi.com/hc/en-gb/articles/360024693814--Downloads-Flight-Switch-Panel
Not had a chance to try them yet.
Ah nice....just as I'd got my own driver working, typical! Still now I know how to write plugins I've got a hankering for some DIY