Thanks for all the replies. I think the vinyl wrap will do the trick and since there’s no technical reason not to cover - I won’t go underneath or remove ONT from the wall as it’s close to floor level and only needs camouflage for what’s showing. Now to find wrap in a dark colour.

I took all the cables off boxes and devices and replaced them with black. Stuck the power board on a beam and made a tiny shelf behind cabinet for the HFC router and the white deco mesh to sit on, (also to be wrapped). The ONT which is not active yet is the only white really obvious apart from a couple of old cables coming in through the floor which are yet to be dealt to as have no idea what they are for anymore, but that’s another job.

Big job almost finished. The cabinet I used has drawers with deep carving in front so air can pass through and It was great to put three Ethernet connected tv boxes in the drawer with cables out through the back to the power source and router. Bluetooth remotes mean they don’t need line of sight. Was so sick of yellow Ethernet cables and boxes in view with the old cabinet.