Email hangs up “checking for mail” and never opens. It happens on Outlook and Gmail email. Started with last IOS 14 update. Tried everything reboot, delete and reinstall, storage, etc. Nothing fixes this, I need this fixed.

Hello, VegaK.

Thank you for using Apple Support Communities.

From your post, we understand you're unable to use two specific email accounts on your iPhone and it hangs when attempting to view them. We'd be glad to help out. You may need to contact your Email Service Provider or authorize your device to use the email accounts on your device if you have additional security settings as stated in this article: If you can’t send email on your iPhone, iPad, or iPod touch

"Contact your email provider or system administrator

1. Contact your email provider or check their status webpage to see if there's a service outage. 
2. Ask your email provider or system administrator if you turned on any security features or restrictions, like two-step verification, for your email account. You might need a special password or may need to request authorization from your email provider to send and receive email on your device.
3. Check your email account settings with your email provider or system administrator to make sure that they're correct."

Best regards.