John, many thanks for the link to Product Feedback! However, when I follow the link, I see that although there are 30 different iOS/iPadOS app icons shown, there is not one for Mail. The icon depth on the Feedback landing page includes unlikely apps like Apple Sports, Freeform, and Clips, which, while may be perfectly fine apps, cannot possibly get the traffic that iOS/iPadOS Mail gets, can they? The omission of iOS/iPadOS Mail would seem to be either intentional, which is worrisome, or unintentional, and thus sloppy, which also worries me. Either way, there's no promising way to leave feedback on this new feature deprecation in iOS/iPadOS Mail. I wish Apple the best in executing in a more effective and logical way in future OS updates.