I don’t understand what you mean. If you want Ethernet run through your house, or coax in more places, or access points mounted, you don’t call your ISP.
You call an electrician or a handyman or somebody and tell them you have some low voltage work.
The ISP provides a cable box and modem to most homes in the same way that the electric company sticks a meter on your wall.
> If you want Ethernet run through your house, or coax in more places, or access points mounted, you don’t call your ISP.
In the US, most do. This is a standard part of "in home installation" when first subscribing to service for all of the major providers in the US.
Example: https://forums.xfinity.com/conversations/customer-service/sc...