You don't need to take any action on the applications owned or managed by Microsoft. Our internal teams are working on their respective applications and once done the changes will be pushed automatically to your tenant.
With respect to 3rd party apps Once the app owners come out with new versions of their apps using MS graph, customers will have to migrate to those apps. As mentioned, if you do not have any in-house development or any of your own applications with dependency on Azure AD graph, you should be good and no need to be concerned.