This article provides instructions on how to make the keyboard larger on Android.
How to Make the Keyboard Bigger on Your Android Phone | Increase/Expand the Size and Height of the Keyboard
You can make your Android keyboard larger or smaller via the Settings app (Samsung) or the Keyboard options (Google Pixel). Other phones should work similarly.
Samsung devices have keyboard size settings hidden in the Settings app. Here’s how to get there:
Open the Settings app.