A new Outlook Monarch build is available for Office Insiders to test. Still a prettier version of OWA, Monarch is maturing, and this build is usable, especially if you prefer OWA rather than desktop Outlook. However, if you need offline working, you need to wait a little longer because that feature still isn’t there.
https://office365itpros.com/2022/09/30/outlook-monarch-insiders/
