This worked!! Thanks very much, Jon!
In the bin I went to Modify > Audio Channels… And actually changed the preset from (Use File) to (Mono) which split the L and R channels into two tracks on the timeline, like you said it would.
The problem was that Premiere thought the clip was in Stereo when it’s actually dual-mono so it put both L and R channel from the clip in Track 1 making it impossible to manipulate them individually.
As soon as I changed the preset to Mono I didn’t even have to change the audio pan.