The FTTP modem installed in the UK by city fibre is the Calix 801G v2 GigaPoint ONT Modem
Unfortunate the model is black in colour so may not match the wall colour where it has been installed.
This is a simple slip over cover to change the appearance.
It was printed in a pale colour to allow the status LEDs to still shine through the cover.
The cover slots over the front so not to cover any of the vents on the side of the modem
This was printed with two walls and 5% gyroid infill (I used ESun natural ABS for my print)
The author marked this model as their own original creation.