Internal SD card reader working on Big Sur

Internal SD card reader working on <a class='btn-link text-primary' href='/2020/12/install-macos-big-sur-on-supported-pc.html'>Big Sur</a>

It's usually considered impossible to get internal SD card readers working, but I just realised that mine seems to be working on Big Sur Beta 5. It never worked on Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina or Success' href='/2020/12/install-macos-mojave-on-supported-pc.html'>Mojave, so I'm pretty happy.

Has anyone else noticed this? I'm curious about what could have changed.

https://preview.redd.it/agc7wr2sr2k51.png?width=1680&format=png&auto=webp&s=c17a45dda6fce1a65888efa0457ffc4cbe09c918

Author: @superl2