Contestants have differing IG membership history. Some have mature accounts, some are verified and some just started their Instagram a/c when they qualified for IL12.
A good yardstick of popular interest is not only the number of followers a contestant has on IG, but also the rate of follower growth.
Here is a growth rate of contestants between 25/3 - 2/4/2021 (7 days)
Arunita 36k
Pawandeep 30k
Mohd. Danish 23k
Ashish 13k
Shanmukhapriya 9K
Sayli 9K
Anjali 8k
Nihal 4k
Sawai 1k
Incidentally, Pawandeep has the most number of followers on IG and Sawai the least.