“Instagram is expanding its Limits tool to allow you to force Instagram to only show post interactions from “close friends.” When this feature is turned on, you will only see when a close friend adds comments to your posts, sends you a DM, replies to a story, and other interactions. While people not on the Close Friends list will still see your posts, any replies, DMs, or comments will be hidden from everyone else.
To use the Close Friends feature, you must first create a Close Friends list. From there, only people who interact with you will get their content through. Unfortunately, Instagram will only let you ban non-close friends for four weeks. After that, you must extend the ban or allow others to see your content. There’s no limit on how many times you can extend the ban.”