Here is another approach you can try:
You need to use the API plan, then utilize multiple custCreate users in this API: https://marketplace.zoom.us/docs/api-reference/zoom-api/users/usercreate
custCreate user 1 will host one meeting
custCreate user 2 will host second meeting
…
custCreate user n will host nth meeting
custCreate user n+1 will be alternative host to all custCreate users {1 … n} so that this user has the ability to host any of these created meetings
Let me know if this helps.
Thanks