I tried to set up ELRS MAVlink telemetry and RC control feature, but the mission planner is not detecting the mavlink telemetry (Baud rate 460800, used a type-c USB cable to connect to the laptop).
If you use external module you have to use the module USB port, if you use internal modules then there is a bit of trouble and it would be best to join ExpressLRS Discord and look there in mavlik-rc channel.
If your module uses dip switches they also have to be set correctly (the default running configuration is wrong for MAVLink over USB)
Telemetry mirroring from the internal module of an edgetx rc wont work.
You can either use usb via an external module (eg: ranger), or flash the internal elrs module backpack to the master github branch backpack fw and get a telemetry stream over wifi.