Firstly some background context...
FTTC cabinets have their exchange fibre connected to the same fibre spine/backbone as the FTTP network (they are part of the same GEA infrastructure) - however the fibre for FTTP does not actually run back to the FTTC cabinet itself. It actually originates from an optical node (an aggregation node) that will usually also serve the cabinet, if that makes sense. This node *may* be near to the FTTC cabinet or in the general vicinity or direction, which may be leading you to think the fibre installed runs to the cabinet.
The photo that you have taken is of an Openreach optical mini-node. Think that's a Prysmian CMJ unit. Typically these are positioned some part way up the pole.
If your commercial neighbours had an FTTP on Demand installation, then right at the top of the pole (or situated in an underground chamber, if the lines to premises are fed by duct) would be one of these CBT units...
https://postimg.cc/VJnC2xym
The CBT (connectorised block terminal) is what Openreach use to connect a premises drop-fibre connection into the FTTP network. Each 'nut' on the outside of the CBT hides a special port called an OptiTap terminal - this is where the drop fibre to the premises is connected. To be able to connect to WBC FTTP then you need to have one of these CBTs on your pole (or footway chamber) serving your property. Like this...
https://postimg.cc/McTYM19v
Can you see one of those one that pole or another serving pole for your neighbour - and can you see a drop fibre connection serving their premises?
Now to your question - *if* your property is served by the same pole (or chamber) as your neighbours FTTP connection (presuming they actually have one), then in theory there should be spare ports available on the CBT...
What does the
BT Wholesale (address) checker say for the actual commercial presumes address (rather than your own)?
If this result for their address shows no FTTP active service and there is no evidence of a CBT, then I would say the fibre node on the pole is for a dedicated (fibre-based) leased line service for your neighbours rather than for FTTP. In which case that wont support WBC FTTP for you.