Please follow the below instructions to create a Facebook feed with the scheduled generation synced with Magento 2. Set up the initial product catalog in Facebook business account in Data Sources → Data Feed → Next.
Then specify all the required settings following the steps offered by Facebook.
Step 1. In the first step, choose upload option.
Step 2. From the product feed grid, select a feed that should be added to Facebook catalog by copying its link. You may use the Google Feed template to create a feed for Facebook and adjust it if needed, as the requirements for the attributes are similar.