Hello skstefanny,
Thank you for your inquiry.
Zoom does support the feature to allow a participant to join different meetings or webinars simultaneously from the Zoom desktop client. The requirement is for the user to be a licensed Business, Enterprise, or Education account holder and you can only join from the desktop client not mobile device.
The following link - https://support.zoom.us/hc/en-us/articles/360001120743 provides detail information on how to enable this feature via Zoom support and use it.
Kindly click on Accept solution if this response has answered your query.
Thanks,
Adanna