[URGENT] IG Comment Limit on own Posts?

Hey, I have a question that has something to do with commenting on IG. I know there are limits on commenting on posts. But what if I want to comment as much as possible under my own IG Post, with the account I posted this post? Is there a limit, too?
I'm asking this question because I've seen an IG Account that commented over one million Comments under his own post with the Account he posted with! This could not really work if he would have been within the normal IG comment limits. It would take more than a year to comment all these things and the post was just 1 day old.

I hope someone can explain this to me and knows how this works

You can do that with a verified (blue tick) ig account

of course theres a limit on both your posts and others posts it won't work without a verified account