Hi
Yes, it is possible to remove several of the built-in Apple apps from the Home screen on your Apple Watch.
If you have no use for those built-in, Apple apps on your iPhone, then removing them from your iPhone's Home screen also removes them from the Home screen on your watch.
To remove an app from your iPhone's Home screen:
Touch the app icon and hold your finger there lightly (do not press down) until the icons jiggle. For apps where the option is offered, tap on the "X" next to the icon to remove the app from the screen.
Note that removing a built-in app from your Home screen also removes any related user data and configuration files, which can affect related system functions or information on your Apple Watch.
Apps can be restored by adding them back via the App Store on your iPhone.
An alternative option is to move the unwanted app icons to the outer edges of the app layout on your watch's Home screen. On your iPhone, rarely used built-in apps could be placed in a dedicated folder, which itself could be moved to a separate Home screen.
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