I have found a workaround for this issue:

1. Run npx expo start --go
2. Scan the QR code with your phone's camera app > it should open in your device's default browser
3. In the "How would you like to open this project?" prompt, select "Expo Go"
4. On my device, I get a prompt asking if I want to allow it to open Expo Go - after accepting, it seems to be linked up to the dev tunnel

At the moment, this is the only way I can link my app up in Expo Go. For some reason, the QR code when running in --dev-client doesn't seem to be serializing the URI correctly. That, or it doesn't seem to recognize the app that the URI is pointing to, but I certainly do have Expo Go for version 52 installed.