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The information that displays on the Faculty Directory is controlled by the 'Preference' settings on the respective Directory Type record. Currently, there is no preference option for Zoom links.
A potential alternative is to insert a Zoom URL into the Teacher/Faculty members' Email_2 field on their person record if it's not being used. As long as the 'Email_2 field for this person is set to 'Allow Display' on the directory preferences, then their Email_2 value displays on the directories which users can click.