Cxf:
Those settings seem right when compared with my own Deco, but I'm only using 1Gig UFB. Are you sure it's not a layer1 issue, do you see any lights flash on the ONT LAN port? The static public IP is reserved on our end against your username but you still want to learn it with DHCP+vlan10, don't use STATIC on the WAN interface options.
The most notable thing I could see regarding the ONT is that the 10G light goes solid green when connected to the deco - but flashes green when connected to the Orbi (which I assume indicates activity).
And yep I'm using the Dynamic IP option and VLAN10, Priority 0.
I also have a fault logged with you guys to investigate/do a renewal of the lease just in case under ID#42561877