Managing TikTok Catalogs on Shopify involves setting up and connecting your Shopify store to TikTok, and then using the Shopify admin and TikTok Catalog Manager to manage your catalogs and products.
Ensure you set up TikTok on Shopify store.
Connect to TikTok Business Center.
TikTok will create separate catalogs for each country your Shopify store supports, based on the markets defined by your Shopify store settings.