Does the pole you can see from your back garden serve (or did serve in the past ) your address with copper pair service , if not , even if that pole had FTTP on it , it’s not likely your address would be part of it’s designed service area , generally when FTTP is made available it follows closely the way copper service was supplied .
If there is nothing out of the ordinary about your address , yet it shows FTTP available from a wall mounted block , then OR seem to have messed up somewhere.
There is a form on OR’s site that effectively says my neighbours can get FTTP but I can’t , that gets OR to check if a property has been inadvertently overlooked (as far as availability is concerned) unfortunately there isn’t a similar form for when an address has been included when it should not have been included but it’s here , you could try using it for something other than its intended purpose.
https://www.openreach.com/forms/fibre-broadband-availability---customer-form
You can get situations where very similar addresses are ‘mixed up’ especially if in the same general area, so postcodes are very similar , for example Oak lane , Oak Crescent, Oak Street , could that apply here ?
