Hey Siri recognise my niece voice

I don’t know but with with ios 14.4 recognises other voice over siri and allow to manage somewhat my phone which siri can do when phone is located. I noticed when my niece was controlling my iPhone XR.

Previously I never noticed this. I am Male and she is just 8 years old. The voice is in opposite side but still siri is allowing.

i reset siri voice and re enable but still the same.

is siri recognise other voice too ?