The node that runs on Umbrel is Bitcoin Core... lol
Discussion
not true. you can run knots as well. you can even switch from core to knots without a full resync. here’s a video from mayank showing how to do it.
https://blossom.primal.net/bd46fa52c36f30b4d64adc6596189e9a3deecd60b2e096cffac68a83238da008.mp4