How to share an audio file to whatsapp from mac

I have made an app where I can record an audio message, listen back, edit, re-record etc. Now I want the user to be able to share the final edit to a whatsapp channel.

I have added an image of the whatsapp logo. I want the user to be able to click and it opens the whatsapp desktop and the channel menu to then pick the right channel and send.

How might I be able to do this?

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