How to change the site icon, as a favicon?

This theme supports the default Site Identity section provided by WordPress.
Follow the steps given below

1. From your WordPress Dashboard, go to the Appearance --> Customize --> General Settings --> Header --> Logo Settings >> Site Icon
2. Now click on Select site icon and pick an image
3. If you are dissatisfied with your site icon, you can use the buttons below it to Change logo or Remove it.
4. Click on Publish.