Worth remembering ‘KCI 2 Assure’ can sometimes appear out of error on the dsl checker. I had FoD installed in June 2017 and the checker was showing ‘2 stage’ until 2018 with nice clear ducts already in place. However since 2018 the checker is now showing KCI 2 Assure for me and this is despite having a 4 port live ONT. When I had 2 additional FTTP lines activated last year they went live without any issues (one of them took 48hrs). I think others on fttp (with a live service) are also seeing KCI2 appear as an error - Paul @ Ilford is one of them.
So there’s always the possibility the dsl checker should show ‘Stage 1’ for both properties.
BT Business FTTP(oD) 330/50 -- 4+2 ONT -- Netgear RAX200