Adding public zoom meetings to zoom calendar

I work for a law firm and there are several courts that publish their zoom meeting links to join and either watch or participate. We have a polycom system that is connected to a zoom account. The polycom can connect to Zoom meetings either manually, or ones added to the account calendar. We would like to add these public meetings to our zoom calendar. I have tried taking the link and putting it in the outlook calendar connected to the zoom account. The meetings never show in zoom. I have tested the link and I can create meetings that sync and end up in outlook. I can invite that zoom account to meetings another creates and that ends up in zoom meetings and the outlook calendar. But I have tried manually adding the meeting to the outlook calendar, and tried inviting that outlook account to a event using that public zoom link. Zoom isnt seeing the link or something.

How do I add these public meetings to our zoom calendar?