One of the new feature in Blender 2.9 is the ability to display statistic information of your object. A display that sits on the top left side of the viewport or at the bottom right.

Display statistic information as overlay in the viewport:1. Click on the Arrow button next to the Overlay icon.

2. From the drop down select Statistics.

3. You will notice an overlay statistic information appear on the top right side of the viewport showing objects numbers, vertices, edges, faces and triangles. (Note: The statistics display information does not carry to the other work space [...]