https://www.cnet.com/news/facebook-bulk-delete-third-party-apps/

Amid increased pressure in the wake of the Cambridge Analytica scandal, Facebook has released a new tool designed to help you more easily manage the third party apps that have access to your data. 

Previously if you wanted to delete third-party apps from your Facebook page you had to delete them one by one. But now it's possible to delete them in bulk. Facebook confirmed the addition to Techcrunch Tuesday.