This could open up the ‘Primary Feeds’ page, where you have to click the ‘+’ button to incorporate a whole new feed. Additional attributes like brand, GTIN, and MPN may be needed depending on the product class. Make sure that all info is precise and current to comply with Google’s https://www.youtube.com/watch?v=niKMB5IWi_Y&t=4s&ab_channel=ShahabKhan