SPAD.neXt supports the Logitech G-Panels natively. No FSUIPC needed, but FSUIPC as connection method is supported as well.

Nice, thanks for sharing. I'll implement it for next release.

The docs is still WIP and not offically released yet ... so no wonder you could not find it ,)

If it's not giving results, then it's a msfs bug most likely.
maybe there is an lvar holding teh value

Answered in Discord.
Create an empty page in the streamdack software, to which you switch when using SPAD.neXt.
You can also disable the "Darken Device" option in SPAD.neXt for the stremdeck. This will prevent SPAD from clearing all buttons when starting.

Please contact me on Discord and we can work on it. Should be very similar to VRInsight stuff.

Good Idea. Will be added to next update.

That's caused by the standard USB Sleep Problem:
viewtopic.php?f=4&t=11832

Yoke Clock: Will only work if you installed the correct OLD Drivers for it. It kinda tricky. Working on an own version of the drivers.
Ailerons: Do you have any other stuff running/Installed? E.g. Logitech Micorosof Flight Simulator Addon?