Default drivers available at VRInsight (FSX ones) may still worked for MSFS but functionallity could be limited unless they updated them recently.
Anyway all VRinsight products work using Spad.Next, as it has a specific interface to use them with MSFS. Indeed you can configure every button to send whatever action you want to any addon that uses custom variables in game, what is not possible using the default product drivers, so it´s more flexible. You can even display custom data on the LCD screens.
However Spad.Next may be for advanced users only. I can confirm that this method works with the MCP Combo II Boeing because I own that device.
The other alternative you may have is using FSUIPC. That also worked on the Boeing panel as FSUIPC can be configured to detect the panel as a regular joystick too.