Using the Mail app on iPhone

I want to use the iPhone Mail app only on my phone for emails. I have and use my xxx@icloud.com email id for all of my email. However I mistakenly clicked on Yes in Settings > Name > save to iCloud> Mail. Now the Mail app looks only in iCloud for email and I can’t see my emails in iPhone unless I have in internet connection. I want Mail app to stop accessing my emails on iCloud and use only on my iPhone, so I can access my emails whether I have an internet connection or not.

Just turning the Mail on Settings > Name> iCloud back to Off doesn’t work. Mail is now requiring me to set up a brand new account, see ”other” below, and the set-up isn’t working. I just want to stop Mail from going to iCloud for my mail.

Does anyone know how can do this?