Does anyone know if the Microsoft Authenticator app will work with Cloudflare’s TOTP?
Yes; choose the Google authenticator option, the QR code it generates works for any TOTP app including Microsoft Authenticator.
There is no Google authenticator option in Cloudflare. When I clicked on Add for the "Mobile App Authentication: it says install an authenticator app on your mobile device, then scan the QR code in the authenticator app.
i looked up Google Play store and it seems that MS Authenticator has good rating, but I am not sure if it will work for Cloudflare and not just MS accounts.
Previously, the button was called ‘google authenticator’, but it looks like they changed it to that.
MS Authenticator does regular TOTP and thus will work with Cloudflare.