If by support, you mean will you still be able to use your physical Authenticator on your account? Yes, if you have a physical Authenticator on your account you will be unaffected by the Migration.
I actually note that in the sticky at the top of the page:
I have a physical Authenticator keychain. Do I need to take any action?
No. The physical authenticator is not affected by this change. However, the physical authenticator is no longer available and when the battery dies you will need to use the Battle.net Mobile App to continue using the Authenticator feature.