This is from the prepaid days - they used to be considered as an e-money institution which has relaxed requirements for ID verification, so they could get away with different tiers of verification.
Now they are a bank, so there is only one level of verification - assuming you’ve got an account you’re verified.
They are part of Monzo’s history and I don’t want it all gone - maybe instead they should have a mention how they are about a deprecated product (the prepaid) as to not mislead new customers.