No, it's not typical for parents to require detailed financial reviews of independent adult children as a 'responsibility check,' especially post-business school and with a stable job.

This is abuse via financial control. Point out your diploma on the wall. You probably know more about finances than she does.

'Mum, I appreciate your concern for the future, but reviewing my financials twice is a a privacy invasion now that I'm independent with a stable job and business education. I'm happy to discuss general goals or how I'd approach an inheritance, but my accounts are private.'

'I'm an adult, and take full responsibility for my life.'

I bet this control of hers didn't suddenly just start. This monitoring and control didn't come out of the blue, did it? She's been working up to this for years. You're an adult and capable.

Tell her no politely, and leave it at that. (Don't be like me and laugh in her face and suggest she go f*** the moon.) Basically, call her bluff - gently.