https://wccftech.com/macbook-air-and-macbook-pro-users-report-issues-with-usb-2-0-devices/

Many 2020 MacBook Air and MacBook Pro users are reporting issues with connectivity to USB 2.0 devices. The issue is related to using USB 2.0 devices becoming irresponsive when connected via a USB-C hub.

The issue has been reported on Reddit with USB-C docks from StarTech 7, Satechi, and Anker.