Why is my ex ignoring my social media?

Hey , I'm just going to keep it short.
When me and my ex broke up we settled on that we were gonna be friends and we were gonna be alright Note: we were friends before the relantionship. So when we broke up he liked my social media and watched my stories and what not. But after like a month he completley stopped.
Is is because he has totally moved on?
I don't know why he is ignoring me on social media when we have mutual friends
Note: I unfollowed him on every social media , but he has not.

So
Why is he ignoring my every social media all of the sudden?
Thanks
Why is my ex ignoring my social media?
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