Use Microsoft 365 in iOS Mail App - with Active Sync Disable

Hi,

I was wondering if I'm missing something - I used to be able to get my work email (Microsoft 365) on my phone via the iOS standard Mail app. We have now turned off Active Sync and, as expected, my work email is no longer syncing as the iOS Mail app seems to require ActiveSync to work.

Literally, all third party mail apps, such as Sparks, Edison Mail, etc, support Microsoft 365 email and allow me to sync my email even with Active Sync turned off at the server level. However, despite going through the 'sing-in' process, the iOS default Mail app returns an error message that the account could not be authenticated. I just want to make sure that this is an iOS Mail app limitation (it works fine on the Macbook Mail App) and that Apple does not currently support what Microsoft terms 'modern authentication' with ActiveSync turned off - I don't like running multiple mail apps on my iOS device and prefer having all my mail in one app. Is anyone aware if Apple plans to support mail sync via modern authentication without ActiveSync, which currently seems to be a prerequisite for it to work? Particularly as Microsoft will retire ActiveSync in the near future.

Thank you