Is there any way to delete unwanted apps from my Mac?

They are stored on the read-only boot volume. No one, but a bit-monkey could easily delete things on the read-only boot volume.

The read-only boot volume serves 3 purposes.

Helps prevent malware from modifying the operating system.

Keeps users from accidentally deleting or modifying a critical operating system component. There used to be a lot of posts in these forums from users that turned their Mac into a doorstop.

Cuts down on Apple Support calls because a user accidentally deleted or modified something they should not have. Less pain for users, lest pain for Apple.

There's no way to uninstall Apple apps that are pre-installed with macOS.