Does anyone know of good libraries to gauge password strength or find easy password. I'm conflicted between using all leaked password vs. simply excluding super

Does anyone know of good libraries to gauge password strength or find easy password. I'm conflicted between using all leaked password vs. simply excluding super popular and well known pattern. Not sure exactly what measure to take to stop easy password. The password crackers now recognizing so many patterns some of the big passwords can be very trivial and it can be hard to recognize those. I have found some libraries that seems to have the right idea but would love a recommendation of what are the best/easiest one specially if can find one in Java and is not overly convoluted. Also love recommendation of open source self hosted 2FA solution. Looking at the core process of TOTP and prompt based 2FA (public key crytography) there's seem to be no reason either cannot be implemented as a library. Am I incorrect in that assumption?