It may have said "Do you approve/ agree / want to accept this code?" Or something like that.
I figured I'd write the code and ask my kids whose it is.
If it's the first, then it may have been a legitimate MFA call, and that means that someone was in your account and you let them in. Would you know what account it was? You can check the sign in logs. Also, the phone number where the call came from.
The call itself may have been a total spoof and meaningless. Just verify that it wasn't a real call to be safe.