Access M1 MR1100 vis USB-C while IP passthrough enabled

I normally use my M1 behind a wireless router so I've enabled IP passthrough and disabled onboard DHCP. Sometimes I would like to quickly remove it from my home network and use it elsewhere, the desire is to use it attached to my MacBook via USB-C without having to change settings.

Even with the USB-C port set to charge + tether I am not able to get to the M1. Network settings shows the MR1100 as disconnected. Is there a setting on my MacBook that will allow this? Even if I can just access the M1's settings it would be a step forward.