iPhone Email: can not add new account...

I have one of the latest version of iOS on an iPhone 7 and have 7 email accounts working fine under the iPhone's email app. But I can not add the 8th email account, and wonder why not?

I got to Settings > Mail but do not see the + plus sign, which I recall was how to add a new account. Am I missing something?

Am I limited to 7 accounts?

At the very top of Settings, I see two Alerts, which might be the problem?

"Update Apple ID Settings" has a red circle with a "1" inside. I try and try to resolve that, without success. I am told to log in rom another device to iCloud, which I do. But the warning remains...

I also have a warning for "Finish Setting Up Your iPhone", a second red circle with a "1" inside But I do not want to set up Apple Pay.

So, with this can you suggest my next step? I really need to get another email to appear in the Mail app for the iPhone.

Thanks.