I dont know about mtls, but Obsidian with the Self-Hosted Live Sync community plugin has end to end encrypted sync between any device. There are a ton of plugins to make it capable of doing whatever you want. I have it syncing between Windows, Linux, and Android currently.

PoE++ Type 4 goes up to 100w, its Type 3 that goes to 60w. Why the hell they didnt just call it PoE+++ I’ll never understand