Thanks for reaching out, stephen_hoeft.
It sounds like you're having some trouble with your Mail app. We can help.
Since you've already confirmed the email account works on your other device, we'd like to rule out some other possibilities next.
Have you tried restarting the iPad? Many times restarting can clear up intermittent issues. Check out these steps for your particular model: Restart your iPad.
If you're still seeing the same behavior after restarting, we can try to update your iPadOS. Unlike other apps you can download from the App Store, the Mail app is built into the iPadOS software, so an update can also straighten out issues: Update iPadOS.
Give those steps a try, and see if there is any improvement.
Take care!