I also did not see it in the feature list but on another forum a user contacted DJI and they said the same thing about it being add in a firmware update.
Hello there nik317. Thank you for reaching out and for the inquiry. I am sorry to say that the 4K Hyperlapse function for the DJI Mini 2 is not available. For latest news, and updates for the DJI Mini 2 kindly please follow us on social media ( Facebook: https://www.facebook.com/DJI , Twitter: https://twitter.com/djiglobal , YouTube: https://www.youtube.com/user/djiinnovations ) for further details. Thank you for your support.