How do I delete apps on my Apple Watch

Here's an article from Apple on how to delete your apps on your Apple Watch.

Delete apps from your Apple Watch - Apple Support

Press the Digital Crown on your Apple Watch to bring up the App View.

If you're using List View, swipe left across the app you want to remove, then tap the red trash button. If you're using Grid View, tap and hold to activate jiggle mode, then tap the X in the top-left corner of the app you want to remove.

Tap Delete App to confirm.

Not all apps are available to delete.