Hi SAVAGEMAV1,
welcome to the Forum!
As mentioned by DORRAGER, the buttons and switches of the Logitech Panels are automatically preset to their normal functions. They also don’t show as periferals in the Controls section of MSFS 2020. For them to work properly though, you need the MSFS Plugin, which you can download from the Logitech Support site. Be careful to look for the right plugin, as there’s a different one for each simulator (FSX/P3D, MSFS2020, X-Plane, etc.).
The other app DORRAGER mentions is probably SPAD.next. However, I don’t know how well it works, although it’s quite praised by some users. If I understood it correctly, it has some sort of trial period and then you have to pay for it.
Best luck