

You should know that there is no longer an official syncthing app and a clone has taken its place. It’s buggy but it works.
Permissions are a bit tricky to set up but I believe the clone app does it correctly by asking for full file browsing permissions.
As much as I would like to agree with you, permissive licenses are killing open source software as a whole since corporations absolutely abuse the software, provide very little value back to the code in return, and often DEMAND the authors patch their vulnerabilities.
Open source props up the world and the least that corporations could do is throw 0.0001% of their revenue their way. But they can’t even be bothered to do that.