Same issue over here. I had the public beta 7 (22A5358e) and after the update, I lost the secondary display that I used with a type-c HDMI dongle. Apple must do something about this cause I think a lot of people are having this problem. I found this on Reddit. https://www.reddit.com/r/MacOSBeta/comments/xpndgj/comment/iq4y8bp/?utm_source=share&utm_medium=web2x&context=3