Here is list of all the command line arguments for Bridge. You probably need to add /autorun as well.
https://docs.ndi.video/all/using-ndi/ndi-tools/ndi-tools-for-windows/bridge/ndi-bridge-automation
https://docs.ndi.video/all/using-ndi/ndi-tools/ndi-tools-for-windows/bridge/ndi-bridge-automation