This video shows how to upgrade an older non-touchscreen Victron CCGX display with Bluetooth to integrate Mopeka Propane Tank Sensor level readings into the Device List. The newer touchscreen displays have Bluetooth built-in, as shown in this video, which gave me the inspiration to try adding Bluetooth to my older non-touchscreen display:
   • Monitor Water + LPG tanks Wirelessly ...  

And it works! Here's a link to the Bluetooth USB dongle that I used:
https://www.amazon.com/gp/product/B00...

One minor issue is that the tank sensors sometimes disconnect and reconnect from the CCGX, probably because they're a bit far away. But it's still very nice to have those readings integrated with my other devices. And they're also integrated into the Victron VRM web portal.