Integrate new payment -- 2

Hi, I need integrate new payment methods in this plataform https://codecanyon.net/item/quickqr-contactless-restaurant-qr-menu-maker/29012439?_ga=2.70528656.1061752141.1635790935-1734072869.1635790900
I have the modules for anothers plataforms that i can send for check.

I use angular js admin dashboard.