Can I increase the size of the keypad on my Apple 7th please

The full on-screen keyboard cannot be resized. However, if your question relates to either the Floating (mini) keyboard - or the Split Keyboard, this is an entirely different matter...

Use the floating keyboard on your iPad – Apple Support

Split and move the keyboard on your iPad – Apple Support

Use the two-fingers-to-zoom gesture to stretch the floating keyboard back to full size, if I’ve correctly guessed what has happened here.

Use the floating keyboard on your iPad - Apple Support

If that’s not the issue, some more words around what you’re encountering and what you’re seeking might help.