Nikaah will happen becuz Billi's truth isn't out now so nikaah is bound to happen
And as per Gul khan's story u see
In Geet shadi was done in one go i mean no breaking the marriage drama's at all
In IPKKND same had happened but ASR arrived at the mandap
Now in QH the same will happen ofcors a huge twist is gonna come our way but we will see the marriage happen and Tannu's truth most probably come out at the marriage day so they are just fillling the episodes with ASYA scenes