Canon EOS R50 Mirrorless Camera (White) - Manual (Page 154)

E-TTL II Flash Metering
Set to [ Eval (FacePrty) ] for flash metering suitable for shots of people.
Set to [ Evaluative ] for flash metering that emphasizes firing in continuous shooting.
If [ Average ] is set, the flash exposure will be averaged for the entire metered scene.
Note
Depending on the scene, flash exposure compensation may be necessary.
Caution
Even when [ Eval (FacePrty) ] is set, some subjects and shooting conditions may
prevent you from obtaining the expected result.
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