Yeah I tried replacing the cable (I used three different USB-C cables). I also used a different USB port on my computer and since that didn’t work either I tried my laptop, which also didn’t work. I also looked up the windows device manager like you did, but the “BCM2711 Boot” device didn’t appear.
I think there might actually be something that doesn’t work on my carrier board. Judging from your screenshot, at least something should have connected to my computer, but nothing happend in the device manager while connecting.