How to record whatsapp video call with audio using screen recorder?

Hello fire___heart,

Thanks for posting in the Apple Support Communities. We're happy to look into this with you. Please take a look at Record the screen on your iPhone, iPad, or iPod touch - Apple Support. You'll notice the following information is provided under section: How to record your screen.

Some apps might not allow you to record audio or video. You can't record your screen and use screen mirroring at the same time.

Given this statement, you will want to reach out to WhatsApp to confirm their permissions for screen and audio recording.

Best regards.