The Android 15 QPR2 beta hints that Google will bring back icon shape customization, a feature it cut from Android 12.
Open the Settings app. Tap Display (Samsung Galaxy) or Display & touch (Google Pixel). Scroll down and choose Font size and ...
Under Settings > Preferences > Appearance, there’s a new “Font” menu with two options. “Gboard default” should be Google Sans Text, while “System default” on a Pixel is still Roboto.