Hi,
We appreciate you clearing that up for us. We have a good understanding of what you are wanting to do within the Mail app on your iPhone and the All folder.
While setting up a mail rule isn’t possible on the Mail app for iOS, we did look around and see the article Flag and filter emails on iPhone that may help. Flagging it would put a copy of the email in the Flag folder making them easy to access. Or you could flag it VIP, placing a copy in the VIP folder.
Another article you may find helpful is Search for and view email on your iPhone, iPad, or iPod touch, the section “View group emails”. It shows you how to quickly sort emails from the sender.
Let us know if we can help further.
Cheers!