The option to turn off two-factor authentication is absent from the Apple ID page
I have followed the Apple website's instructions to visit appleid.apple.com and log in. On the "Manage your Apple ID" page, I clicked "edit" in the "Security" section. It shows that two-factor authentication on, but there is nowhere any option to turn it off. The word "On" is in black letters and is not clickable. Has something changed or am I missing something?
iPhone 8