Mastodon doesn't have a non-chronological feed to begin with. Threads does have a chronological feed but it's very well hidden. In the mobile app, you have to

Mastodon doesn't have a non-chronological feed to begin with. Threads does have a chronological feed but it's very well hidden. In the mobile app, you have to tap the logo to reveal the selector. On desktop you click the arrow button next to "for you".