How to delete Focus app from my phone

As Focus is part of settings, not a separate app, you can't delete it entirely. You can only delete each individual Focus as Neil22R explains.

Hi florene257,

Below you'll find steps to delete a Focus:

"Delete a Focus

When you no longer need a Focus you set up, you can delete it.

1. Go to Settings  > Focus.
2. Tap the Focus, scroll to the bottom of the screen, then tap Delete Focus.

If you delete a provided Focus, you need to set it up again by going to Settings > Focus, then tapping .

"

Turn on or schedule a Focus on iPhone - Apple Support

Cheers.