1. Your account has been shadow banned
Shadow ban limits your reach to only those that are following you.
Accounts that are not following you won't be able to find your posts on the hashtags
2. You are using banned hashtags.
Instagram bans hashtags that contains spammy content.
To avoid this, check your hashtags before using them.
Assuming your engagement rate is really low, let's say like 3% and you are using hashtags with 2M or more post density, what happens is the hashtags swallows your post in few minutes.
You do not have the engagement to rank on those hashtags.
Use hashtags that more specific and searchable.
Use niche hashtags to attract users that are interested in what you do.
I get low impressions from hashtags too.
My last post got only 3 impressions from hashtags.
I know what I did wrong and I will fix it!
Does that stop me from engaging and dishing out great content?
Hell No!!!