If you still use Facebook (or still has an account) it might be an useful tool to check if you have been involved in the data breach. The tool has been created by Reddit user u/FumazDev, with all the code available on GitHub (frontend and backend), if you want to check for yourself.
Also, here´s the original thread if anyone wants to ask him anything directly.
Deleted my facebook in 2012 but I still worry my data was stolen due to them not deleting it properly or at all. But I also do not trust inserting my phone number on some website even if it is open-source the live version might not be, it only takes few edited lines of code to record input, not much can be done with just phone number but still…