Outlook 365 new message pop up notification

Using Microsoft 365 On Windows 10 Pro.

When previously using Outlook 2010 a new message would result in a pop up box bottom right of the screen giving sender, title and a line or two of the message. Found it really useful.

With Outlook 365 I cannot get such a pop up to appear, whether in the Notification box or not.

I've set Outlook options for When new messages arrive:

Play a sound - ticked
Briefly change the mouse pointer - not ticked
Show an envelop icon - ticked
Display a desktop alert - ticked
Enable preview for Rights Protected message - not ticked

On Windows Settings I've set Notifications for Outlook:

Show notification banners - ticked
Show notifications in the Action Centre - ticked
Hide content when notifications are on lock screen - Off
Play a sound when a notification arrives - On
The remaining options as default

Still no pop up box.

I've now created a rule:

Apply this rule after a new message arrives
display a Desktop Alert

This does cause the pop up to appear.

Question really is why do the first two sets of options seem to have no effect?

Check Focus Assist?

Which W10 version?

On Win 10 Pro V.2004

On holiday currently so won't be able to check for a couple of weeks. I think I did look at focus assist but can't remember what if any difference it made

Thanks. Yes, I set those options. I just get the envelope in the Notification area.

I really liked the MSO 2010 way of popping up a small 5-second box giving basic email details and then the box disappeared.

Won't be back home for another week or so, so won't be able to try anything else for the timer being.