I do want to own things...
In the log I posted you can clearly see:
Fri Sep 9 11:00:28 2022 daemon.debug hostapd: wlan1: STA 58:cb:52:38:a3:bb IEEE 802.11: authentication OK (FT)
...
Fri Sep 9 11:00:28 2022 daemon.debug hostapd: wlan1: STA 58:cb:52:38:a3:bb WPA: FT authentication already completed - do not start 4
So FT itself works. It's just that packets are not forwarded to the new STA. See also ongoing discussion in Android device disconnects after fast roaming due to lost DHCP replies - #7 by psherman