Is there not some official site for this? e.g. in the uk we have https://www.freeview.co.uk/ https://www.freeview.co.uk/ which has a reception checker and full

Is there not some official site for this? e.g. in the uk we have https://www.freeview.co.uk/ https://www.freeview.co.uk/ which has a reception checker and full tv guide