I noticed a lot of things get blocked through their web version, as opposed to the app. I can't mention war in Ukraine in a post on Instagram web version - it just doesn't allow me to publish. This is actually the reason I ditched instagram; for now I just stopped posting and scrolling the feed, but I occasionally respond to messages from friends.
I messaged every contact on Instagram I ever talked to in direct messages, and it let me send the link to my Mastodon. I didn't know I would like Pixelfed much more at that time :)