You can try default invocation URL and see if it could launch your appclip
https://appclip.apple.com/id?=com.release.cosa.appclip
Universal Link is never an available invocation option according to the documentation
https://developer.apple.com/documentation/appclip/configuring-the-launch-experience-of-your-app-clip#Review-how-people-invoke-an-App-Clip
You will need a webpage with the smart app banner meta tag in the header to show the app clip card as the entry point
Topic:
App Store Distribution & Marketing
SubTopic:
App Store Connect
Tags: