Mahi themes integrates following font icons which you can enable and use on your website.
- FontAwesome 5 font icons
- FontAwesome 6 font icons
- Bootstrap Font Icons
How To Enable Font Icons
By default, all font icons are disabled. You can enable them from theme settings
Navigate To:
Home 
Administration Appearance Appearance settings Mahi Content Font Icons
example.com/admin/appearance/settings/mahi
Here you can enable individual font icons.
You may need to clear cache after enabling any font icon library.
example.com/admin/config/development/performance