Zoom will only allow a host to run one session at a time. If you wish to run multiple sessions simultaneously, each meeting will need to have a unique host. To create a meeting for another host, they will first need to give you permissions to do so by following the steps explaining how to set up scheduling privileges.
Once you have been given scheduling privileges, you will see a “Schedule For” drop-down menu when you create or edit a meeting. You will be able to select who will host the meeting. You can find out more about scheduling the meeting for another host by reading this article.
To view your current permissions you can log into your profile settings and see the permissions listed at the bottom of the page under the ‘other’ section.