I have no idea how Apple's WiFi engineers can be so utterly incompetent. This beta still has the issue where my iPhone 13 Mini refuses to roam between access points after being connected to an 802.11r-enabled network for at least 30 minutes. I've been reporting this issue for well over a year now. Apple did get back to me at one point and said that their engineers determined the issue to be caused by my specific access points and that I should contact the manufacturer. This turned out to not be true because I got help from a WiFi professional on Twitter that was able to reproduce the same issue on his enterprise level access points. I submitted another bug report in Feedback with links and screenshots to the Twitter thread, but Apple ignored it.