huuduy216 you might be able to force a different height with CSS, but for dynamically adjusting based on the user device, that would require additional code. The EmojiOneArea library itself doesn't have any code to handle vertical resize (just like it doesn't have anything to prevent going off screen if the viewport width isn't wide enough)
Since this extension is under minimal maintenance that's not something I'm going to fix for free. It's maybe 30min to 1h of work that could be sponsored. The difficulty would be to test the new feature on different mobile devices. I personally don't have any iOS device so I wouldn't be able to properly test all common devices.
