LabVIEW itself installs and runs pretty fine on Windows 11. It’s the NIPM part that stumbles over Windows 11.
Other than that NI only officially tests and states compatibility with certain OS versions for releases that happen after the release of that OS. That means the earliest LabVIEW version that might officially support Windows 11 could be 2021SP1 due sometimes in spring 2022.
Note that there are no guarantees. NI doesn’t make statements about when a new release will be done nor what features and compatibilities it has before the actual release date.