You said the mic is plugged into input 2: On your XLR settings, on Channel 2, select input 2. All the configurations you posted above notably don’t include using input 2, where your mic is plugged in. This assumes you’ve got something else, like a shotgun mic, in channel 1.
You’re probably thinking of the channels as stereo pairs, with each
channel having L and R tracks, so you were trying to route input 2 to
the R track of Channel 1; this is not the case. The FS cameras don’t record audio channels in stereo pairs: Channel 1 is a mono track, Channel 2 is a mono track, etc., so you’ll need to route each mic to an individual audio channel.