I also have a reel that blew up to 500k last year that I gained 1,000 followers from. So don’t let people decieve you. Very rarely does viral content convert to such a large following after.

It is possible rare but possible a high reach doesn’t correlate to people taken on the action to follow these are 1.5m and 1.6m roughly same follower count tho I have have a reel at roughly 30k which is gaining 10% follower per view equivalent. So it’s possible there’s no oredictivr indicator as it’s an action that people choose to do they can engage without following or decide to follow.