Hello, per HD case 166892, I'm raising a request to get the engagement metric brought in to the TikTok connector for the BQ_DISH destination. Per that support case:

"engagements and engagement_rate are supported in reservation reports as of now. To get these, Could you please raise a feature request here?  After requesting in the portal, Our engineering team will add the new metrics to custom reports , so that you will be able to configure it."