We have enabled the self service password reset function and enabled the security questions and authentication methods.
And wondering is there a way from within Office 365 to confirm which users have and haven't completed there sercuity questions
No way afaik. Possible with on-prem MFA server, but havent seen anything similar for SSPR yet.
Wonder if that is something that should be a new feature
Not sure, answers to Security questions can be considered as personal information, so being able to read them might not be what some organizations want.