Nice, I like that feature but at this moment it is so inconsistent that some apps have said feature and some don't, if I remember correctly it actually has been around since A13.
Summit
Community to discuss Summit, a Lemmy reader for Android.
App (Play Store): https://play.google.com/store/apps/details?id=com.idunnololz.summit
APK: https://github.com/idunnololz/summit-for-lemmy/releases
Patreon: https://patreon.com/SummitforLemmy
Ko-Fi: https://ko-fi.com/summitforlemmy
Website: https://summit.idunnololz.com/
A13 added the concept of predictive back but it only supported a tiny fraction of what is considered predictive back now. A13 only supported the part where the back gesture would close the app and nothing else. In A14 and above, predictive back evolved into something that can be added for every single screen. Eg. if you go from ScreenA -> ScreenB and then initiate a back gesture from ScreenB then you will see ScreenA to show that will be where you end up.
The v1.45.0 release adds complete support for A14's predictive back. The A13 predictive back has been supported by the app for a long time now so that support is not new with this release.