Instagram and email icon not showing

HI,
I want to show only email and instagram icon. Rest of all sharing icons (like fb,twitter) are there in my theme.
I have 2 questions-
1. Whether it is possible to show plugin icons with the theme icons?
2. Even if I disabled default icons in theme, sharing icons from plugin are not appear any where.. So what things I should check/change?
It is showing plugin’s fb like counter or tweet counter, but not showing main icons.

Thank you

https://www.ads-software.com/plugins/ultimate-social-media-icons/