Floating keyboard doesn’t get bigger when I pinch and zoom or drag to bottom of screen. Nothing works.

Have you enabled the Scribble feature? This feature uses a different mini-keyboard that does not respond to the two-finger zoom or pinch gestures.

Settings > Apple Pencil > Scribble - set to OFF

After disabling Scribble, you may need to force-restart your iPad:

Force restart iPad (models with Face ID or with Touch ID in the top button)

If your iPad doesn’t have the Home button, do the following:

1. Press and quickly release the volume button nearest to the top button.
2. Press and quickly release the volume button farthest from the top button.
3. Press and hold the top button.
4. When the Apple logo appears, release the top button.

Force restart iPad (models with the Home button)

Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.

Otherwise, to restore the new Floating Keyboard to the normal on-screen keyboard presentation, use the two-finger “zoom” gesture (i.e., the reverse of the two-finger “pinch”).

If the Split Keyboard is restored instead of the full on-screen keyboard, you can either use two fingers (one on each of the two half-keyboards) and swipe the two halves together - or touch-and-hold the “keyboard” key, then slide your finger to the Merge & Dock option and release.

Use the floating keyboard on your iPad – Apple Support

Split and move the keyboard on your iPad – Apple Support

Well I had the mini keyboard pop up and nothing I could find would give me the full keyboard back. I have the 13 inch M4 iPad model. What I eventually thought of was that I had recently installed the magnetic pen that is sensed by the Tablet when it is stuck to the top edge of the iPad. And as soon as I put my Apple pen back in it’s resting place on the top edge of my tablet a message popped up showing the charged amount left in my Apple Pencil Pro and the full size keyboard immediately came back. I hope this helps anyone out there!

Tried doing that and it did no work for me. In order for me to get the full keyboard, I have to turn the iPad off and then back on. Apple needs to fix this issue.

I have the same problem. Short of turning off your iPad, try going to the app switcher and killing the app by swiping up. That works for me. Kind of a clunky work around. I hope Apple fixes it.