Canon EOS R50 Mirrorless Camera (White) - Manual (Page 423)

3.
Aim the camera at the subject.
An AF point is displayed around their eye.
To choose an eye when [ : AF area ] is set to [ Whole area AF ], tap
the screen.
If your selected eye is not detected, an eye to focus on is selected
automatically.
To choose an eye to focus on if [ ] is displayed, with [ : AF area ]
set to [ Whole area AF ], you can use the < >< > keys, depending
on the [ Eye detection ] setting.
4.
Take the picture.
Caution
Depending on the subject and shooting conditions, subject eyes may not be
detected correctly, or a subject's left or right eye may not be prioritized correctly.
Eyes are not detected when [
: Subject to detect ] is set to [ None ].
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