My AppleTV 4K 2022 was still stuck on 16.6, and it kept reporting that there were “no new updates”! 🤯
I did a Reset and Update twice, and it reported that the update failed each time. So I did a Reset first, and then it correctly saw that 18.1 was available.
To think that I spent nearly two years with old software while believing that auto-updating was working! 🙄