In iOS 18.2 or later, the Mail app automatically sorts your email messages into categories to help you find and manage messages quicker.
Promotions: Browse your coupon and sales emails.
Note: When a Transactions, Updates, or Promotions message includes time-sensitive information, it will also be included in the Primary message list.
You can manually categorize messages from a sender into the category of your choosing.
Go to the Mail app , or Promotions at the top of the screen, then choose List View.