List the steps you take to sign in to your developer account. What you are seeing is what someone without a developer account would see if they signed in to Apple. When I sign in to my developer account, I see a Program Resources section with the following columns: App Store Connect, Certificates, IDs, and Profiles, and Additional Resources. Each of these columns has a list of links. Do you see these columns when you sign in? Are you able to click the Users and Access link I mentioned in Step 2 in my earlier answer? When I click the Users and Access link under App Store Connect, I see the following links at the top of the page: People, Sandbox, Keys, Shared Secret, and Xcode Cloud. The People link is the initially selected link. There is a Users sidebar with a list of categories. Selecting the All items shows all the users on my team with an Add button above the list of users. Clicking the Add button lets me add someone to my team. I am not an Apple employee so I cannot provide more