Yes, SAB was having most backup episodes ready, and were telecasting fresh content till last week...
Whereas other GECs had stopped new episodes in last week of March.
Kumkum bhagya/kundali bhagya had some backup episodes, and was running fresh episodes till quite long.
Here's an article published on 26 march...
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Due to unfortunate coronavirus outbreak, the entertainment industry in Mumbai has postponed the shooting of all the movies and TV serials, a week before total lockdown occurred in the country from March 25, 2020. As a result, shows have run out of their episode bank, now Ekta Kapoor has shared that Kundali Bhagya and Kumkum Bhagya will stop airing soon. Yes, you read that right!
However, the producer has a solution for it. Instead, of Kundali Bhagya and Kumkum Bhagya, now Ram Kapoor-Sakshi Tanwar’s ‘Karrle Tu Bhi Mohabbat’ which is an ALTBalaji original, will be aired on Zee TV from 9-10 pm.
“Since we cannot make any more eps of #kumkumbhagya #kundalibhagya we have extended our family shows to @zeetv so 9 pm to 10 pm instead of karan preeta or abhi Pragya u will see tipsy n karan! we can’t do anything to help our viewers but entertain them during these tough stressed times so this gem from our library for u all! Ur fav couple #sakshitanwar n @iamramkapoor r back from tonight 9-10pm in#karletubhimohabat on tv! Enjoy n stay home n stay safe”