I can’t install watch apps on my new Apple Watch Series 6

Hello winters5757,

We understand that you're having an issue installed apps on your new Apple Watch. We certainly want you to customize your device to your liking. You can add apps directly from the Apple Watch or through the Apple Watch app on your iPhone. Install apps on your Apple Watch

If you still have trouble installing apps taking those steps, you'll want to see if there are any account issues that would prevent your from downloading and installing apps.

If you can’t download or update apps on your iPhone or other Apple device

Cheers.