Hey @MarinaPapagiann to add to Vishnu's comment above, an Instagram feature is currently in planning. At this time, there are no plans for a Pinterest integatrion. I'm going to close this Idea as "Not Currently Planned" as it pertains to Pinterest, but you can track the Instagram request here. I'd encourage you to comment on this post with what details on what exactly you'd like to see in an Instagram integration monitoring / publishing / reporting etc. The more detail / context you have the better!
Thank you for taking the time to submit this idea!