I have similar issues with a different brand of 15-in-1 USB hub (Woohubs B07XCBVQRT) on an M1 MacBook Air Working: Charging PD at full wattage HDMI to 1440p monitor (+ sometimes it causes kernel panics and restarts but that was even with Big Sur) USB flash drives, External Hard Drives What doesn't work that used to work on Big Sur: Peripherals in general (usb Mouse, Keyboard, Wacom tablet, webcam) DAC/AMP combo through USB Ethernet (Realtek chipset but the driver doesn't seem to work) I have not tested either Microsd or SD. (edit: added webcam to list of not working)