Dancpa,
In the article previously shared you can find steps to turn the feature off.
"Follow up on emails
If you send a message and don’t receive a response for several days, the email automatically moves back to the top of your inbox to help you remember to follow up.
Go to Settings > Mail, then turn Follow Up Suggestions on or off."
There isn't a way to dismiss individual emails you don't need to follow up with when this feature is on. You can leave feedback about the new feature here: Product Feedback - Apple
If you need further assistance, reach out to Apple Support directly.
Contact - Official Apple Support
Contact Apple for support and service - Apple Support
Best.