Not sure if you can help with this one, but for some reason, every block I edit in Gutenberg has 2-3 ‘button settings’ options in the right sidebar as well as having the same amount of ‘link’ options above the block in the editor.
I built the site originally about a year ago but I’ve only noticed this problem recently. I’ve tried disabling some plugins but the problem still seems to persist.
I had a few reusable blocks on that page which had one of their ‘multi button’ blocks nested in them. Once I converted them to regular blocks I stopped having the issue.