Did you find the answer? I am in a similar boat. I have an Opi0 as NAS working well for 6 years?, but now Syncthing stops working and it's likely the age of the underlying distribution. So I want an up to date (ish) build, but the kernel 6.6 build doesn't boot- LAN port lights come on but no status lights on the board so I guess the support for this board is long out of date.