If you created your Instagram account using an email address, you might not have linked it to your Facebook account. Facebook isn’t a service that everyone uses, but it is very easy to link with Instagram for those who do. They’re both subsidiaries of parent company Meta, so they’re deeply integrated and share many of the same features. For everyone who hasn’t done so already, this is how to connect Instagram to Facebook.
To link Instagram to Facebook, open Instagram and go to your profile page. Tap Menu (≡) >Settings > Accounts Center > Set up Accounts Center > Add Facebook account. Log in with your Facebook account and choose what you want to sync between both accounts.