Android shows encryption but doesn’t even have WPA3 support on my device so it only sees and connect to wpa2 wifi’s.
iOS connect to WPA3 but it is impossible in iOS to see what encryption it use.
Ubuntu runs wpa3 and you can see it in wifi settings.
Do they work with only wpa2?
Do the devices even see the ssid name in the list?
But I would say wpa3 is many years away before being a working hardware standard with working AP drivers as wpa2 is today.
I've had good luck with SAE-Mixed mode on ath10k devices. It all comes down to 802.11w support on your devices. It needs to be supported and impeccable.
Out of about 20~devices I have, two refuse to work when 802.11w is set to optional. And it doesn't matter what the encryption is set to (WPA/WPA2/SAE/SAE-Mixed). One device is a french phone with bugged support in firmware, the other is an old Intel WiFi card that never supported it.
I have two SSIDs for my 2,4GHz and 5GHz networks. One for 802.11w compatible devices set to SAE-Mixed, and the other one for the misfits with WPA2 set.