Hello, @Rurico!
To attach an image in a Zoom chat, first sign in to the Zoom desktop or mobile app. Open the chat window and click or tap the plus (+) icon next to the message box.
Select Send a File, then choose either Your Computer or a third-party file service to upload the image.
Once the upload is complete, the image will be attached to your message and ready to send to the chat participants.
You can also check out this link for more information.