Google is introducing a new design for an increasing number of its apps and services. The new account switcher is now available on the Google Play Store for Android. Google relies on Material Design 3, which was recently included in Google Trends. The new appearance is improving and becoming available in more apps.
It will then look like the image below. The prior old version is on the far left, an update that has been issued in the meantime with different forms is in the middle, and the latest version with the integration of the dynamic colors of the Android operating system is on the far right (since Android 12).