This recommendation can surface both applications (app registrations) and service principal objects as the "ID" value. More importantly, it can surface some first-party (Microsoft) entries, which you cannot do anything about. For example, if your organization is using Microsoft 365, you will likely have an entry for Microsoft Office (d3590ed6-52b3-4102-aeff-aad2292ab01c). Any such entry you can safely ignore.
For the rest, you're following the correct procedure - check the Enterprise applications tab as well as the App Registration ones, and look for a matching ID. Should you find an entry corresponding to app developed by your organization, work with the relevant teams/folks to make sure the app is updated.