The @threadsapp account has announced a chronological tab.

The For you feed includes a mix of posts from profiles you follow and recommended accounts. Following shows you posts from profiles you’re following, starting with the most recent.

To switch from For you to Following, tap on the Threads icon at the top of your feed and swipe.

This is needed, but the web app is what everyone really wants. I want that too, plus the ability to create lists. I mean, a Threads version of Tweetdeck would really make me happy, but I’m not holding my breath for that.