Hello @Jesse_Herrera 
Sorry, I think I misunderstood your question!
I looked into it and yes, you can’t enter a decimal (.) using the keyboard.
This should be a bug at Numpad, so I just created a bug report and added your voice to it. Thanks for the heads up! 
At the moment the only solution would be to use the Tab , Shift + Tab to navigate between buttons, Space to press buttons. Here you can find more information about keyboard support: Accessibility features of Mobiscroll components for various frameworks.