Shadowban

Hey,

So I have an account that has not done any actions but merely posts with powerlikes/comments. There is one hashtag per post. However the hashtag never shows and the account has not posted in 3 days. Anyone got any ideas? (I can't give the @ of the account, sorry)

Go to your latest post and click on - "View insights" then swipe up and tell me how many % of people weren't follow you.

Many popular hashtags are shadowbanned.
Make sure you use more suitable and usnique.

Test with hashtag has at least post (I usually use the account name) -> try using another account to find your post. Sometimes, hashtag you use has many post too, you didn't find your post.
You should pay attention to the number of likes and comment - if the number is too much; although instagram does not warn you - but your account is at risk of being shadowban