Shopify sales app. Adding a field are surfaced using the "More actions" drop-down with a modal

Dear Shopify,

I am following this tutorial - https://shopify.dev/apps/channels/onboarding#product-publishing to build a sales channel app.

I am working on adding the admin link which triggers opening a modal to provide metafiles on a product view without redirecting to other pages but I am confused with how to make the modal view with the action on from “More actions” because the admin link(https://shopify.dev/apps/app-extensions/admin-links)only requires a link which is always redirecting to other pages and is not opening modal.

How can I use a modal view with the admin link action as the below image?

Cheers for all,