> Install the Syncthing app on your Umbrel and pair it with the Syncthing app on your phone or computer for a self hosted peer-to-peer backup solution.
This text is identical word for word in the Syncthing app file at the Umbrel repo.
Not all of Umbrel's code is open source under a FOSS license for them to fork it under GPLv3. Even if they did fork it, I see no attribution to the original authors.
I hope meienberger here hasn't plagiarized source-available project named Umbrel.
The comments in this file seems similar too:
https://github.com/getumbrel/umbrel-apps/blob/eb0f119df8ed89...
https://github.com/meienberger/runtipi-appstore/blob/c86641b...