Are "branch" deployments possible?

[lrholmes]

The Vercel git integration maintains two types of deployments/aliases per branch:

• Commit deployments, which all have a unique URL, there will be a new one for each commit pushed
• Branch alias, which have a fixed URL representing the current branch name, and will always represent the latest commit deployment. Useful for sharing with others when quickly iterating on a piece of work (can just ask someone to "refresh" after changing something instead of managing unique URLs).

Our current integration with this action covers the "commit deployment" case perfectly, it's pretty much the same as what Vercel provide.
However I don't see a clear path in the docs to supporting branch aliases in a native way. I guess it might be possible using ALIAS_DOMAINS, but I would be curious if Vercel would properly recognise the deployment as a "branch", so that this sharing feature could be supported:

Any insight would be appreciated, and thanks for maintaining this action! 🙏