Roop and SA gaining more TRPs than Udaan isn't an issue, they're in prime time and should fetch more, SA is still 5th at its slot with Kulfi fetching 2.8 compared to its 1.4 and Roop is 3rd with ISA getting 2.8, both are lagging behind more than Udaan.
Now even BB is out of top 20 and they still have 2 shows in top 10 and only 4 in top 20.
Udaan should do better but their performance isn't bad given the slot and that the show is better suited to a later time slot.