Samsung released a subset of its Galaxy AI features for the Galaxy S21, S21+, and S21 Ultra already, and this includes Circle to Search of course. However, the Galaxy S21 FE did not receive Circle to Search at that time, despite the fact that it shares its chipsets with the other members of the S21 family.
This error has finally been rectified now. Samsung has brought Circle to Search to the Galaxy S21 FE as part of the August 2024 security update, which is now rolling out in Vietnam and should be coming to other markets in the next few days. This also fixes over 50 security vulnerabilities in Android and Samsung’s One UI.
As you may already know, Circle to Search does exactly what its name implies. It allows you to circle anything on your screen and get information about it. You can even find out what song is playing around you (or on your phone). You invoke Circle to Search by long pressing the white bottom pill bar or the home button if you still have one.
Source