Google Meet is issued from the top one in the calendar account settings, the account with the calendar set up to register appointments.
Google Meet URL not issued
If the Google Calendar is linked with Google Meet, a Google Meet URL will be issued when the schedule adjustment is completed, but the Google Meet URL will not be issued in the following cases
When "Register Appointment" is set to "OFF" on the calendar integration setting screen.
In the above cases, the Google Meet URL will not be issued, although the Google Meet location can be selected on the booking page.
Click here for more details about calendar linkage settings.