Was your address recently ( and using the official processes ) separated from the original property it was a part of , so has its own front door , Utilities, council tax , registered with the Post Office as a separate address etc ?
If done properly but recently, it’s possible that the time of the Openreach survey ( which may have been some while ago ) the address hadn’t been converted into separate addresses, and was still a single ‘unit’ , in that case only the single unit was catered for, because that’s all that existed at the time , if these addresses have been separate for many years and officially done , then presumably it’s an oversight.
The solution ( provided the address is properly separated with its own council tax etc ) is to ask OR to check ,
https://www.openreach.com/forms/fibre-broadband-availability---customer-form
Fill in this formwize , along the lines of my neighbours can order FTTP but I can’t, OR will then check , if your address was unofficially separated, then this won’t work , but you could simply order a second service for the proper address, as your unofficial address will never be a valid one , if it’s all proper and correct and just an oversight or a recent development, then the formwize should correct the Openreach data , provided the area isn’t already at capacity .
