Depends on whose contractors they are and if the connection to the headend is complete. Then before install happens it has to be tested and signed off as ready to supply.
Last lot of fibres today jointed today by contractors . all finished on the estate according to jointer , what's the next phase for it to happen
so jointers have been doing joints in the road and now have moved onto the small boxes outside the houses, Openreach
engineer has been following them provably doing quality testing
how long does it take form the end of the contractors finishing to be able to order
It takes as long as it takes. It could be days, weeks, months, or even years.