About last year I was in the same situation (pending banking info) and couldn't update my free apps. I believe that doesn't change, though I hope they do. If anyone can submit free app with user info pending, please comment! My clients just accepted the new agreement that came out today and automatically have to accept Schedules 2 and 3 despite only providing free apps, not sure what happened. You can press contact us button located on the bottom right of App Store Connect page and ask them to remove the paid app agreement. Alternatively, you can also proceed with filling out the user info, you won't get charged for anything unless one day you provide paid apps / IAP.

Found an answer from the doc. Gonna leave it here for anyone having the same problem in the future. The owner can grant additional permission through App Store Connect > Users. https://help.apple.com/app-store-connect/#/devdbefef011