The app you're talking about is called Diagnostic Data Viewer [1].
However, your statement is not correct. It's true that most system diagnostics / telemetry flow through this application; however, that's only one part of the network requests going out of your system.
There are network requests being made every time you type a character in the start menu (whether or not you have web search enabled). That is not considered telemetry so it does not show up in the Diagnostic Data Viewer. It is also not possible to disable it (there were various group policy and registry settings that worked at some point in time, none of them do any more on latest versions of Windows 11).
Similarly, when the "recommended" container of the start menu refreshes itself, it does a lot of network traffic, none of which is recorded in DDV. And of course, any applications that come with the system but are not core OS (OneDrive, Office, Store, Xbox, Cortana, Explorer, etc.) will send their own telemetry (and other network requests) which do not go through DDV.
However, your statement is not correct. It's true that most system diagnostics / telemetry flow through this application; however, that's only one part of the network requests going out of your system.
There are network requests being made every time you type a character in the start menu (whether or not you have web search enabled). That is not considered telemetry so it does not show up in the Diagnostic Data Viewer. It is also not possible to disable it (there were various group policy and registry settings that worked at some point in time, none of them do any more on latest versions of Windows 11).
Similarly, when the "recommended" container of the start menu refreshes itself, it does a lot of network traffic, none of which is recorded in DDV. And of course, any applications that come with the system but are not core OS (OneDrive, Office, Store, Xbox, Cortana, Explorer, etc.) will send their own telemetry (and other network requests) which do not go through DDV.
[1] https://learn.microsoft.com/en-us/windows/privacy/diagnostic...