Hi jtkobeki,
Thanks for reaching out to Apple Support Communities. Let's troubleshoot the Mail app with the following steps:
"Close and reopen the app
Force the app to close. Then open the app to see if it works as expected.
Restart your device
Restart your iPhone or restart your iPad. Then open the app to see if it works as expected.
Check for updates
To see if updates are available for the app, open the App Store, tap your profile icon, then scroll down to see if updates are available. If updates aren't available for the app, update the software on your iPhone or iPad."
If an app on your iPhone or iPad stops responding, closes unexpectedly, or won’t open
Cheers.