ZainCash integration wallet to WordPress website

Hi I want to integrate a ZainCash Wallet Plug-in for WooCommerce on basic WordPress Microjobengine theme, i.e. I need the Zain Cash plug-in to appear inside the theme’s Payment Gateways and in the MONEY WITHDRAWAL section as an option in the Microjobengine WordPress theme. My theme have a fully functional store system and I only need to add the ZainCash Payment Gateway Plug-in for WooCommerce, I don’t need the shop that comes with Woocomerce system.
Important: I need the integration of woocommerce-zaincash-gateway to be on the Childtheme of my theme not on the Parent theme in order not to overwrite the code of the parent theme.

Note: ZainCash Payment Gateway Plug-in for WooCommerce is a local wallet payment Plug-in used in Iraq which integrate with Woocomerce system. See link for further info Connecting using WordPress (WooCommerce plugin) (zaincash.iq)
I have the Zain Cash Plugin-in files and the code that I want you to add.
Besides I need you to sync ZainCash Payment Gateway Plug-in for WooCommerce with the Escrow and house commission system Invoice in my theme.

Development URL: https://test.zaincash.iq/
Production URL: https://api.zaincash.iq/
My Domine https://microjobstore.com

Redirect URL https://test.zaincash.iq /)

The API test credential:


Note: I have all the API test credential.