For anybody here in future. Ran into same issue. I had new year of membership & had already accepted agreement in apple.developer.
For some reason navigating to devices > removing any unused devices seemed to fix my issue & allowed me to accept the agreement in app store connect. Essentially, fix the banner in your devices section & it updated my banner in the agreements section to allow me to actually review.
Topic:
App Store Distribution & Marketing
SubTopic:
App Review
Tags: