FTTH is available on nearly all of the street apart from the last 5 houses which mine would be included in, not sure if it is a postcode problem or it has been genuinely missed.
Once you've moved in, you can use the Openreach customer contact form
here and select "I cannot get fibre but my neighbours can". They'll investigate and let you know the outcome.
If properties are fed from overhead you may be able to get an idea of whether your property is included or not, by counting the CBT ports on the poles. Generally there will be one allocated per property, so you can see if there are enough to cover the 5 at the end. (The CBT doesn't have to be directly on the pole serving you; it could be an adjacent one and the cable strung from pole to pole).
OTOH, if the 5 properties at the end were built at a different time, and/or there are wayleave issues or unadopted road, it's quite possible they were missed intentionally.
At least you have G.Fast available at decent speed, implying you are close to the cabinet, as a stop-gap until FTTP eventually comes along.