How to go from face tile to full photo

When I choose People and a person, I get a mosaic of photos with the person (and Show More). If I click, it selects. If I double click, it brings the full picture to full screen. I have "Photos" chosen on upper right, but it works the same for "Faces" choice. Like you, I'm running Monterey.

The first click should only show a selection to allow you to select more than one of the images. Once selected, you can double-click or hit space bar to expand it to a screen view, or you can hit return to edit. I never get a big blurry face image, though I can see it blow up to a bigger face and then quickly pop into the full image as it loads it. This might take longer to happen if you are saving space by keeping only lower resolution images on your mac. Are you using iCloud? Do you have "Optimize Mac Storage" checked in Preferences>iCloud?

Are you referring to bing in one of the library views or the People view.

Have you tried double clicking on the thumbmail? Or clicking on the Space bar once.