How to handle a UX issue that cannot currently be fixed (deleting Facebook posts on a 3rd party site)?

I'm building a small app that scans social media for posts that meet a certain criterion and helps the user delete those posts.

Sadly, Facebook does not allow us to directly delete posts using the Facebook API. Therefore, we have to display a link to the post and tell them to delete it manually. (The post is set to open in a new tab.)

There's a message at the top of the page of flagged posts that explains the process. As we've gotten a lot of complaints, is there any way to help reduce the impact of this issue that we can't directly fix?

In addition, would it be helpful to make it clear that it is a Facebook issue and not an issue with our software?

Sadly, embedding the Facebook site is also impossible because of Facebook's security restrictions.

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Here's a quick mockup: