Here each Chinese character in the character picker is surrounded by this wasted black margin, and there's no way to increase the size of the characters any further, no matter using the Keyboard settings, or Android settings itself.
Yes, you might might say, "Use the accessibility magnifying glass", but that is just a temporary solution.
And here, even with big fonts chosen, Gboard suffers the same fate.
Seen on Samsung A13 Android 13.
