On the Verify an Account (MFA setup) link to the Microsoft and Twillio apps (both apple and google) rather than require the user to search the store on their own. This may help users not fall into scams of paying for apps. For example, searching apple for "MS Authenticator App" results in the top listing for a paid app.

Or add to this page that both options are free, if a user has a paid app they have the wrong app.