How to migrate Authenticator to the Battle.net App

Hello!

I got e-mail notification from battle.net of legacy Authenticator will be unavailable to use 5.1.2024 and I should migrate Authenticator to the Battle.net mobile app. I have both Battle.net Authenticator and Battle.net Mobile app on my phone.

Can someone tell me how to migrate Battle.net Authenticator to the Battle.net Mobile app? How do I can know that is my Authenticator migrated to the battle.net after downloaded the app?

What about desktop app on my computer? Do I have to do something there so my Authenticator is migrated to battle.net?

Can someone help me with more details?