If the checker states waiting list then it’s a case of waiting until a port becomes available
To address your point, if an address with FTTC is ceased by the occupant , ( possibly because they are moving out ) the Openreach FTTC records for that port will show it as available, ( no one goes to the cab and disconnects it ) so an ISP with a customer waiting for a port to become spare can see the cab as ‘available’ , it’s when the new user of the FTTC port is connected , that the old line the service was on, is converted back to a regular line.
If Openreach left it connected and reserved to the ‘old’ address while it wasn’t in use , then others waiting for a port could be waiting a very long time , and while unused ports are tied up with ‘empty’ addresses , it may be many months , before someone moves and wants FTTC , or someone moves in but doesn’t want to use OR FTTC, that’s why, in part , when a FTTC service is ceased , the port shows as available immediately, it would be a poor use of resources if OR turned away definite customers , while waiting for a possible order to turn a ceased service back on.
The fact is you are in a position where the cab has no spare ports, you need to keep checking , and if ‘waiting list’ changes to ‘available’ get your order in quick.
