How do I receive a nortification from every single email from an account in Mail?

I set up a work email account in Mail. I want to receive a notification from every single email that I receive from this account. I looked at

How can I get push notification on all of… - Apple Community

It says

1. Go to Mail > look for and click edit in the top right > and 'Add Mailbox'
2. Select the sub-folders in your mailbox you want to receive the push notifications for, and select 'Done'
3. Go to Settings > Mail > Notifications
4. Look for " Favorite Mailboxes"
5. Open 'Favorite Mailboxes' and configure your preferences for mail notifications.
6. After you finish you should now be able to receive notifications for those sub-folders based on the notification preferences you set in Favorite Mailboxes

But I do not see the first step. Please advise.