Missing Delete Account Button iOS14

I am attempting to delete a defunct email account (iPhone 11 iOS14) but the delete button is missing from: Mail>Accounts>"the relevant account"

I have managed to set the status to inactive and recreate the same account again (transferred from IPMAP to a MS Online Exchange account)

NOTE: there is a greyed out message where the delete account button would have been stating: These settings are installed by the profile "The relevant account Secure Mail Setup"

Any advice as to how to get rid of he superfluous account?