Is HEVC decoding in iOS 18 WebRTC performed using hardware or software decoding?

iOS18 Added support for WebRTC HEVC RFC 7789 RTP Payload Format. (112001659),How can i determine whether iOS 18 WebRTC uses hardware or software decoding for HEVC?

Is HEVC decoding in iOS 18 WebRTC performed using hardware or software decoding?
 
 
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