No triggers visible from Unfolded Circle 3 web interface

Then there is something wrong with the app. I checked it online and it shows this:

The permission means that the app can request device and Flow information from Homey and then it will likely check the triggers that way. Either it’s not requesting the Flows correctly from Homey or it isn’t forwarding them to the remote.

Unfortunately, the GitHub link is no longer available, so I can’t check how it requests and forwards Flows