I'm glad I don't have a facebook account or Instagram or twitter or snapchat etc. More trouble tag they're worth.
How Apps on Android Share Data with Facebook - Report (even if you don't have a Facebook account) December 29, 2018 https://privacyinternational.org/report/2647/how-apps-android-share-data-facebook-report
You are tracked by Facebook even if you don't have FB account, unless you have taken steps to prevent it.
Multiple iOS apps are reportedly sharing sensitive data with Facebook February 22, 2019 https://www.engadget.com/2019/02/22/facebook-data-sharing-body-weight-period/
State Launches Online Data Survey as Part of Facebook Probe April 16, 2019 https://www.securityweek.com/state-launches-online-data-survey-part-facebook-probe
These menstrual tracking apps reportedly shared sensitive data with Facebook https://www.cnet.com/news/these-men...portedly-shared-sensitive-data-with-facebook/