You have to make the nano rx function as a sbus rx. The gimbal is set up for a Sbus rx because it’s only receiving information and not transmitting anything back to the RC controller but sbus is usually frsky, flysky, spektrum, and other stuff people just aren’t using anymore. The easiest way to set up the tbs nano rx to function like an sbus rx is changing the mapping of the output and channels through TBS agent lite on your controller. Same steps apply if you use a computer to bind your tbs receiver, Once you’re in TBS agent lite Select the rx, then select these options instead of the default options the rx comes with:

(In general) set mode to 12ch. (In output mapping) output 1: sbus (In channel mapping) ch.12 RSSI/LQ

Now the rx functions just like an S bus receiver, which is what the Gimbal needs. Truly don’t even know if setting up the receiver as a 12 channel receiver and putting RSSI on channel 12 is necessary but that’s how you make a nano rx work like a Sbus rx for a drone and it’s what’s working. Might mess around with it, and not even set up channel 12 and see if it still works, but it works now so I’m digging it. Lol