Hello Riley997,
Thanks for reaching out to us in Apple Support Communities about the keyboard on your iPhone is too large to access all options. We're happy to help by looking into this more!
Sounds like you have one of the accessibility options enabled that is changing the appearance of the keyboard. It's difficult to know exactly which one based on the description, but here's a resource that can help:
Accessibility - Vision - Apple
You can click on one of the options to see more about it and how to enable or disable this options in Settings.
If you still need help, send us a more detailed description or a screenshot of your display so that we may be able to pinpoint which option has been enabled.
Hope this helps.
Best Regards.