Instagram doesn’t really publicize this practice, so it can be difficult to know when you are being shadowbanned. One clear sign is a sudden drop in engagement (likes, comments, shares) on your posts. You might also notice that you are not showing up in search results for certain hashtags, although this doesn’t necessarily mean you are being banned. Source https://theytlab.com/youtube-watch-time-smm-panel/

You can try to get rid of the ban by contacting Instagram’s support team, but this won’t work if you’ve been reported for violating community guidelines. The best way to avoid being shadowbanned is to not post anything that could be interpreted as inappropriate, such as threatening or hateful content or self-injury. It’s also a good idea to not go on comment/like/DM-streaks or rapidly follow/unfollow accounts, as these activities can often be mistaken for bot behavior and lead to getting flagged and shadowbanned.

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Another common reason for being shadowbanned is using banned hashtags. Instagram will block the use of hashtags that have been reported as spammy or offending, so if you have been using those in your posts, you may find that they are not working anymore. If you are using a third-party app to manage your account, be sure to check its settings and remove any apps that are not official Instagram partners or come from questionable providers.

You can also use a banned hashtag checker to see whether any of the ones you’re using are on the list. If they are, removing them from your posts should help get you unshadowbanned.