Yeah, I know.
Aurora is immutable, I fucked up. Oops.
Edit: unsubscribed. My life will be better.
For the F-droid enabled users, it seems there's a Syncthing app in the Termux repos:
~ $ apt show syncthing
Package: syncthing
Version: 1.28.0
Maintainer: @termux
Installed-Size: 26.4 MB
Homepage: https://syncthing.net/
Download-Size: 7857 kB
APT-Sources: https://packages.termux.dev/apt/termux-main stable/main aarch64 Packages
Description: Decentralized file synchronization
"Restricted" means the app has been limited by your Android on the amount of data it may transmit/receive as a background app. The app settings assume you're on a meterd or low-volume data plan, and so they don't transmit data except when they're active, or up on your screen.
Their upload/download tallies will still count in your Network accounting. Frankly, your screenshot looks like something I'd expect. Nothing untoward seems to be occurring.
Let those other restricted apps 'run in background" (an app permission) and you'll see a different picture.
This is so meta it hurts.