First of all the websites ie Facebook, Instagram, Twitter are not yet banned. BUT to be honest YES it's possible they can be banned in near future.
What happened??
Basically when Govt of India issues some rules for OTT and websites for Facebook, Instagram, Twitter the Govt is very much serious about the rules and also give deadline to companies to accept the rules and do necessary changes till 25 May which is completed yesterday. Actually its really important for companies to accept the terms as if they won't accept them they will be banned by Govt. Of India.
What NOW??
Well as of now I can't say anything because no one has given any statement or anything. Last year after India banned most popular apps like TikTok or PUBG and proves that they really don't care about company image if they think that this application or website can be dangerous for people of India then they banned it at any cost.
It's possible that companies are still working on the updates but if they need more time they should asked for more time. I hope companies issues some statement as soon as possible or they will face consequences.
Have a look at the new rules issued by Govt. Of India here.
