Sharing photos by WhatsApp
WhatsApp cannot be added to Mac "share" menu
iMac 21.5″, macOS 11.7
WhatsApp can't be added to Share menu, but there is a simple work around I have found. First share to email, open WhatsApp to chat with person you want to send e.g. photo to, drag the photo from the email to WhatsApp and send, then delete email.