Customize Stripe Connect Yith plugin, integrate UPS XADAPTER plugin to YITH Multivendor and frontend manager plugin

Hello, I need to the admin cashed his commission and the shipping amount UPS (we use UPS Xadapter plugin available here [login to view URL]). If the shipping is free because the seller want to offer free shipping, we need to cash the real shipping rates UPS. Integrate this in the child theme to can update plugin without lost the customization. We use the plugin Stripe Connect by Yith available here [login to view URL] and use the Flatsome template. With this plugin, both the admin and the receiver can print a PDF summary of the commissions paid. But it's not an invoice. The seller must be able to print an invoice of the admin commission + shipping amount, with VAT detailled in the invoice. We use the plugin Invoice and Shipping by Yith [login to view URL] Need to integrate UPS plugin to the multivendor plugin YITH and Frontend Manager YITH Plugin. In this case, the seller can print label UPS, send a pickup to UPS (need to integrate pickup UPS plugin to frontend manager and multivendor YITH plugin, actually our plugin is integrate to Dokan plugin). See doc for more information please or contact us.