I believe that’s a documented glitch in OZW. Mine shows the same thing, but works fine as a Z-Wave Plus controller. Keep in mind that the Z-Wave Plus capabilities are primarily handle in-network (between the dongle and devices), and it’s not critical that HA displays what you expect. The baud rate is another example, where it shows 40000 even if it’s actually communicating at 100000.
Edit: here ya go: Aeotec ZW090 Z-Stick Gen5 US Reports Not ZWave Plus