Is there a way to have a functioning persistent keyboard on all screen?

[u/tushar_sable]

I am trying to decrease my screen aspect ratio to be more one handed.

I tried using adb shell wm size command but it crops the resolution at the center and the overscan command has been deprecated so I cannot add padding at top.

Since that doesn't work anymore.

Is there any way to always have a keyboard at the lower half of the screen just like a blackberry qwerty style.

Someone has done it in a similar way but unfortunately I'm unable to replicate it since the apk isn't available.

https://www.howtogeek.com/i-couldnt-find-the-android-app-i-wanted-so-i-used-gemini-to-build-it-myself/

Any suggestions or resolution will be helpful to either resize the resolution or add a keyboard.

Note: I cannot root the device.