I was able to do some research and unfortunately I couldn't find any way of obtaining these devices at the moment. It seems that almost only the manufacturer offers such add-on devices.
According to the manufacturer's online user manual, the following four security modes are available:
- None - No password
- WPA2-PSK[AES]
- WPA-PSK[TKIP]+WPA2-PSK[AES]
- WPA3-Persona
A WPA2+WPA3 mode does not seem to be possible.