App opens on Android 12+ are accompanied by an animation for a "more consistent & delightful experience." Android animated splash screens ...

With that being said, there's a good chance that Google will update all of their apps to include this splash screen, and I just haven't gotten those updates yet. You know how Google is with updates.

Drawing inspiration from its smart TV app, YouTube for Android introduced a splash screen animation back in September 2023. One year later, the YouTube Music app is now following suit.