That's the norm I'm afraid, there's been lots of posts on here over the last year or so where people's cabinet hasn't been updated, but all around have. Could be for any reason, like planning, blocked ducts, issues getting power and the like.
In my area, my cabinet was in the first phase 2 years ago, another cabinet close to me got it's FTTC cab earlier this year, was supposed to be in my phase, but got dropped for some reason. Then other cabinets close to me are only getting their FTTC cabs just now.
You may be able to get more info from the Openreach NGA team, this
FAQ site has an email address you could try.