Can you confirm you are asking about Face Recovery because, what you’re describing are the Generative Models
Recover & Redefine
The image below has the Recover preview window around the King fisher’s is this what you’re seeing, you’ll also see a similar preview window with the Redefine Model
This second image shows a closeup of the Generative Models options plus Model Settings with a Details Slider underneath and below that Face Recovery with a Toggle Switch
Forgive me if I’m wrong but, have you mistaken the Model Settings Slider as the Face Recovery control simply because, the words Face Recovery are highlighted and you hadn’t actually flicked the Face Recovery Toggle Switch to on.
Here’s an image of the Face Recovery Controls after the toggle switch has been turned on