Disabling mandatory MS Authenticator app

Good afternoon,

We have text and call authentication set up as multi factor authentication for our users.

This has worked very well up until recently, when Microsoft have started to force the option of the authenticator app on users, and made it unskippable despite our setup.

The option to skip is not present on the "improve your sign ins" screen.

Where is the setting to disable the forcing of the authenticator app for the user?

I have seen on other posts there are options to disable this. For example here: https://learn.microsoft.com/en-us/answers/questions/1338546/users-are-being-forced-to-use-microsoft-authentica

If, as in the screenshot in the "accepted answer" post we change the registration campaign status to disabled, does this remove the enforced app prompt?

At present it is currently set to "Microsoft managed".

We are fine with the app as an OPTION however it should not be mandatory as it does exclude people who do not have the latest phones, or indeed, any smart phone.

Chris