It makes sense to check if your Facebook data was exposed.  This site seems like a good place for that according to various news sites – https://haveibeenpwned.com/

This article from Forbes mentions that some users’ dates of birth were exposed by the Facebook breach.  “As well as phone numbers and email addresses, the data exposed in the Facebook breach includes dates of birth, relationship statuses and locations.” – https://www.forbes.com/sites/kateoflahertyuk/2021/04/06/facebook-data-breach-heres-what-to-do-now/

A little more information can be found in this Wired article “What Really Caused Facebook’s 500M-User Data Leak?” including this about the data not coming from the 2018 Facebook data breach “the recently public trove of 533 million records is an entirely different data set that attackers created by abusing a flaw in a Facebook address book contacts import feature.” – https://www.wired.com/story/facebook-data-leak-500-million-users-phone-numbers/