Editing the '/create-post' page

Hi all! I’m currently in the final stages of developing a blog that deals with sensitive material. To help safeguard my members, they can report an issue with posts to the admin (me) for review.

I thought I had this covered by simply adding a ‘Report an issue’ button to the ‘Post’ page as seen below:

However, if a member then clicks the ‘Create a Post’ button on my blog feed page, the button sits behind the post editor like so:

Is anyone aware of how I can edit this ‘/create-post’ page so the button doesn’t show in the background, without it being deleted from the post page once it’s published? Alternatively, is there a simpler way to incorporate a post flagging mechanism that doesn’t require me adding a button like this?

Thanks for your help!