Danke für die Antwort. Hab nun auf Networkmanager umgestellt. Dort kann man WPA3 Personal auswählen. Leider funktioniert es nicht.
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2415] agent-manager: agent[9d33177297b01318,:1.28/nmtui/0]: agent registered
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2480] device (wlan0): Activation: starting connection 'wpa3test' (ca064304-1e02-424e-96d9-971b9a0a597a)
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2487] audit: op="connection-activate" uuid="ca064304-1e02-424e-96d9-971b9a0a597a" name="wpa3test" pid=2620 uid=0 result="success"
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2501] device (wlan0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2538] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2568] device (wlan0): Activation: (wifi) access point 'wpa3test' has security, but secrets are required.
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2570] device (wlan0): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2739] device (wlan0): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2760] device (wlan0): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2786] device (wlan0): Activation: (wifi) connection 'wpa3test' has security, and secrets exist. No new secrets needed.
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2792] Config: added 'ssid' value 'wpa3test'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2794] Config: added 'scan_ssid' value '1'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2796] Config: added 'bgscan' value 'simple:30:-70:86400'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2797] Config: added 'key_mgmt' value 'SAE FT-SAE'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2799] Config: added 'auth_alg' value 'OPEN'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.2801] Config: added 'psk' value '<hidden>'
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.3328] device (wlan0): supplicant interface state: disconnected -> scanning
Oct 03 17:09:02 raspberry NetworkManager[1897]: <info> [1633273742.3331] device (p2p-dev-wlan0): supplicant management interface state: disconnected -> scanning
Oct 03 17:09:05 raspberry wpa_supplicant[1917]: wlan0: Trying to associate with SSID 'wpa3test'
Oct 03 17:09:05 raspberry wpa_supplicant[1917]: wlan0: WPA: Failed to select authenticated key management type
Oct 03 17:09:05 raspberry wpa_supplicant[1917]: wlan0: WPA: Failed to set WPA key management and encryption suites
Oct 03 17:09:27 raspberry NetworkManager[1897]: <warn> [1633273767.9314] device (wlan0): Activation: (wifi) association took too long, failing activation
Oct 03 17:09:27 raspberry NetworkManager[1897]: <info> [1633273767.9317] device (wlan0): state change: config -> failed (reason 'ssid-not-found', sys-iface-state: 'managed')
Oct 03 17:09:27 raspberry NetworkManager[1897]: <warn> [1633273767.9413] device (wlan0): Activation: failed for connection 'wpa3test'
Ich hab das ganze nun sicherheitshalber mal mit nem Android versucht, dort verbindet sich der Client ganz normal.