Just a word of caution regarding where you request/opt for the ONT to be situated.
The saga of my sisters FTTC/FTTP migration outlined here:
https://forum.kitz.co.uk/index.php/topic,26339.msg441623.html#msg441623I believe you are NI resident, she is resident in Ballyclare.
The majority of OR's FTTP installs Aerial or UG still seem to be carried out by sub-contractors, usually KN Circet in NI.
If you plan to rely on Wi-Fi connections to your domestic devices then the router location is obviously important.
If you plan/have the capability to run an ethernet cable between the ONT and the router then won't be a problem to situate the router at the optimal location for Wi-Fi.
If you manage to get the ONT situated within a short ethernet, jumper cable distance from the router situated at the optimal Wi-Fi location again no problem.
My FTTP installation was UG by OR's sub-contractors, I managed to control the process by pre-installing a duct, pre drilling a hole and fitting an ONT enclosure, for reference the saga is here:
https://forum.kitz.co.uk/index.php/topic,26792.msg449417.html#msg449417Good luck with the migration