Are you using Class reminders to send meeting links (i.e., Zoom, Google Meet, etc.)? You can add a custom Class reminder message to each Class. This is where the meeting link will go.
Go to the Classes page, and click on the Class (or the far right arrow). Click the pencil icon to edit the Class. Scroll down to the Email Reminder section and enter the text for the link.
To create the link, highlight the text, then click the link icon (to the right of the "underline" icon) and enter the Zoom meeting link: