Have you seen the “Shizuku” app? It utilises the debugging api to give some extra permissions that regular apps wouldn’t usually get. Works on GrapheneOS and can give SwiftBackup a lot more power on devices that can’t grant root access. You might find you don’t need full rooting.

Looks like the last update I applied to my LG TV via USB was truly the last one it’ll ever receive. No way am I ever connecting my TV to any network, that’s what streaming devices are for 🙂