Are you talking about green pods, or smaller black manifolds?
Both are splitters, but the green pods deal with many more people, each black manifold will serve 8 to 12 premises.
Sounds what may have actually happened is that the FTTP roll-out is partially done, and its waiting on the other fibre manifolds being installed so people can then order and be connected.
The green splitters hold a number of trays for fibres and optical splitters to split the light from incoming fibre onto multiple outgoing fibres and these splitters are normally scaled so that everyone can order, and similar with the manifolds, but you do find scenarios where one manifold is missing - reasons can be many from someone forgot, to pole needs replacing as is unsafe to climb through to teams just got called elsewhere on a higher priority job.
Without an exchange, cabinet or postcode hard to say much more.