And it is that clearly terms are being confused in this case. It seems that having the same or a similar processor on iOS devices and on Mac computers with macOS, leads to confusion when it comes to application compatibility on both operating systems.
For now, the applications that are running on macOS right now with Intel processors will continue to be compatible, sooner or later they will end up making it possible to work on these new Macs. In fact, we already have many of these applications confirming their compatibility with macOS Big Sur and ARM processors on Macs. But that does not mean that all apps will be able to be used on Macs and for example Google, with YouTube, Google Drive, Gmail, etc. they will not have an application on macOS, but now they do not have it either.
What they confirm in Apple with Apple Silicon is that the applications natively are not going to change at least at the moment. The apps that are used on the iPhone or on the iPad will not be compatible at this time, although it is true that they could make them compatible in the future. This seems unlikely right now but it is not a problem either as they have never been before and would have no reason to do so now.
Netflix or HBO for example have already announced that they will have their app for Apple Silicon and many other applications that will arrive, but this does not mean that the rest will be compatible. In addition, Apple will add it within the applications themselves as it did with the Apple Watch a while ago, They will use the app store to warn that the apps are not compatible with macOS.
It seems that the confusion is served these days before the arrival of Apple Silicon and therefore it is important to know how to differentiate these types of applications that They are not there now and possibly not when Apple Silicon will launch. Facebook or Google will not have their apps on the Mac as they have already confirmed, but this could change in the future if they want.