I cant make much sense of the map.
I looked at the east midlands where it seems to show lots of rural areas covered but not city centre of coventry, leicester, derby, and nottingham, albeit nottingham seems to have partial city coverage. derby has some small parts planned.
Leicester has a ongoing cityfibre rollout which is not represented on the map at all. Same with coventry.
Maybe it should be renamed fibrevillages?
The map is managaged and maintained by Openreach, so no surprise it doesn't show any CityFibre rollouts on it. It also maps out wider exchange areas that OR are planning to build, it won't include any smaller FTTP projects such as new builds or BDUK deployments.
The build in progress here but the map shows 2025 ! Not to be trusted at all
It's 'by December 2025' so that could be any time from today in theory. I think the reason they are giving these far out dates for exchange areas is largely because there will be phased deployments at an exchange level. While the bulk of the delivery might be done 2021/22, there could be some areas within the exchange coverage that won't be completed until 2024/25.
I would assume there will be a large scoping effort around all the targeted exchanges to understand which villages, streets, estates (etc.) are going to quick and easy to deploy to and which aren't. Openreach will likely then focus their efforts on the easiest areas first to grow the FTTP footprint as quickly as possible before moving into the harder to reach areas.