Sometimes, it's not possible to use the Zoom integration due to the app not being allowed to connect with 3rd party tools like Reclaim. That said, you can still add Zoom meeting links to your Smart Meetings after setting them up.
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To start, create a new smart meeting and let it schedule on your calendar.
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Then, locate the first instance of the recurring event in Google Calendar and edit it. Then add the Zoom credentials here:

This will set the Zoom credentials for the recurring event. They may not show up on future events, but once the first event with the link is in the past, the next event will show the meeting details.