The dream of many iPad users is that one day the Mac operating system can be used in it, as if it were a fusion between the two. Apple made it clear that the macOS line and the iPad line would still be very close but would never touch., in the purest style of parallel lines.
Since the arrival of macOS Catalina, the Mac operating system came very close to the operating system of iOS devices, although it is true that it is not the same. Using iOS apps on Mac, a very similar interface on both systems but always under that "kind of air bubble" that does not allow both to touch.
Now an iPad Pro shows how macOS Catalina works
It is not something official that comes from Apple far from it. The achievement of making macOS Catalina work on an iPad has been achieved by Yevgen Yakovliev, and in 9To5Mac they echoed the news. Using the UTM application to create a virtual machine would be the trick in this case and what Yakoliev is really doing on this 2020 iPad Pro is virtualizing the Mac operating system on it. East video of just over half an hour posted by Yakovliev himself shows it and explains:
Of course it is something unusual and also curious. Be that as it may, it is not something that we are going to see officially by Apple almost certainly so using Catalina on an iPad Pro is possible but it is not something that Apple is going to allow us.