Using Classic Outlook on Windows for personal email, calendar, and contact management
Micro$oft also removed from New Outlook the Option-->Mail-->Saved Messages-->When replying to a message that is not in the Inbox, save the reply in the same folder.
Unhelpfully, this is not on any roadmap or message center that this feature is being considered for future updates.
https://techcommunity.microsoft.com/discussions/outlookgeneral/new-outlook---keep-replies-in-folder/3977508
"Support recommends we submit feedback to Microsoft by clicking on Help | Feedback." lol, no thanks idiots.
Stuck with "Classic" Outlook until they either stop gaslighting us with 'improvements' that are far from it (yes, without precedent), or we somehow find an alternative out from under this useless behemoth's monopolization of nearly everything digital in the collective West (even less likely...)