Apple iOS have a functionality to configure which default app is used to manage OTP Mobile Authentication on iOS. The associated setting is available in iOS Password parameters.
Currently, IOS is not listing Lastpass authenticator. Lastpass authenticator is installed in the IOS. Other similar application installed in the IOS are listed (Authenticator (from Google), Authenticator (From Microsoft), Authy, FreeOTP, OneAuth, Protect (from Onelogin).
This is a real issue because, when user scan QR code from IOS Camera it can't use Authenticator App,
because the url otpauth://totp/username?secret=***OTPSECRET***&issuer=applicationname
will automatically redirect user to Apple KeyRing.
you can look at this screenshot: https://sharing.oodrive.com/share-access/sharings/35Iw0aLX.plLhlbli
I oppenned support case in parallel but if community can confirm / help also ? 