New Outlook missing search bar

I'm experiencing an issue with the New Outlook Desktop application. When I first open it, the search bar at the top is visible. However, after some time, it disappears along with the options in the top right corner (minimize, close, settings, etc.).

The only way to restore it seems to be by closing and reopening Outlook, which is quite inconvenient. I've checked the settings but can't find any option to toggle this feature on or off.

Any help would be appreciated. Thanks!