Another way to ask this question is, what are the odds of any two people generating the same private key at any time?
The answer for this question is pretty interesting, but to make long story short, you have a better chance of winning the lotto 9 times in a row.
Bitcoin private keys uses SHA-256, which is the number 2 to the 256 power. Which is an unfathomably large number.
If you counted all the grains of sand on planet earth and all the drops of water in all the oceans on earth, you would not even come close to that number!
More detailed explanation:
https://www.youtube.com/watch?v=2eZ5DP2P5AsThe odds would be zero I must say, because the private keys are auto generated, unless you change them to popular phrases you can remember or know with a group of people just like a mime, it would be very difficult, if not impossible for anyone to guess someone's private key or seed phrase.