However, to let the vendor sell a gift card, you have to make these plugins compatible with WC Marketplace. If you want your developer can contact us and we can share the hook/filters.
Alternatively, you can also hire our customization team to develop this for your site. You can contact the custom team via this link: https://wc-marketplace.com/custom-development/ and share your requirements. They will get back to you with price and estimate.