WFM Agent Availability Sync Fails After Zendesk Import

Does anyone know why agent availability status is defaulting to ‘Unavailable’ in Genesys Cloud WFM immediately after importing schedules from Zendesk? The API call to /api/v2/wfm/scheduling/agents returns a 200 OK, but the dashboard shows no active shifts for the EU1 region. In Zendesk, this mapping was handled by the sidekick plugin. Looking for a configuration fix in the admin console to bridge this gap.