Part of the answer depends on the wifi adapter and part on the OS version they're running. See here for Intel card support for WPA3. [URL]  
Hi! We are using Latitude 7490 toghter with Unify APs. Now when we enable a new Wifi Network with WPA3 our comupters are unable to connect to that network. Do latitude support WPA3? Could the problem have something to do with Unify PMF ( Protected Management Frames)? Is there a way to get Latitudes to work with WPA3?  All comupter are up to date with updates from Dell.   Best regards  
WPA3 - /PMF