Ask HN: Unreleased Products

In the past few months, especially with AI, there have been a lot of posts "[company] releases [product]", where a company has not in fact released a product—they're just testing it with their friends in closed alpha/beta; you click through and it's just an email signup waitlist to be notified when the product is ready.

Is there some kind of flag or tag for these? How can I distinguish real releases from "we're in testing"/"we will release soon" announcements?

Can we start tagging these?