Is Sarla's fate sealed?

So Sarla died in Kum Kum Bhagya so will she die the same way in Kundali bhagya too? how many years of difference is in both the timelines? its so bizarre my head hurts thinking about it.

Was that mentioned in kumkum bhagya ? 

If most of the oldies are alive in KKB then Sarla is as well but she is busy with other shows. If Pragya is around 60ish then her mum with be 80ish.

KB is about 25-30 years behind so probably KB will take a generation leap in a a year, or 2, something like that.

A bit confusing but KB will take a generation leap so it should sync up then.