Yes, the 2019 offline installer works on Windows 11 21H2, 22H2, and 23H2, provided you run it in Windows 10 compatibility mode (right-click → Properties → Compatibility → Windows 10).
And for years after, whenever someone in his audio forum asked, “Where can I find the old Waves MaxxAudio Pro offline installer for a Dell 2019?”—Leo would send them a link, no strings attached, with a single note: waves maxxaudio pro for dell 2019 offline installer