Actually: updates here:
https://www.microsoft.com/en-us/microsoft-365/roadmap?filters=Mac%2COutlook%2CLaunched (this is what's actually released). It does say iCloud and IMAP should be in general release now.
But the distressing part is the very short list of pending items- there are 4, but none of them would be super high on my list (needed, yes; but again, Online Archive access should be on there as a very high priority since it was in Old Outlook). The Uservoice listings show a lot of things that are not on the Roadmap- so its hard to take the Roadmap seriously as a forward looking thing, but seems a bit useful for looking at the recent past.
Categories/Color Coding UI is pretty bad (and was in 2016 too).
Smart Folders all the way at the bottom are pretty useless (especially if I can't make them a favorite).