Best way forward is probably going to be a fresh install using the Hexos ISO (once pool import is supported) and importing your Core Config and following this guide:
https://www.truenas.com/docs/scale/24.10/gettingstarted/migrate/migratingfromcore/
I've got a Zimaboard with 2x 4TB Seagate Ironwolf drives mounted on the back of my TV, bolted into the VESA mount of my TV.
I really think this is the perfect home setup as long as your TV is not wall mounted. It's also practical to have the TV there when you need a monitor for the server, as I just did during the setup.