I reported this issue several days ago. I am still unable to see any subfolders or files in Android/data using the latest available version of My Files. I also tried it with another file manager but the result was the same. I am using the S20 Ultra 5G.
Welcome to Android 11. This is, unfortunately, a design decision that Google made in the name of privacy. Apps can no longer access the `Android/data` or `Android/obb` folders (the latter is allowed only if the user has granted the app permission for installing APKs)
You can still use the AOSP files app (Settings -> Storage -> Files) to view and delete files from the `data` directory, as well as copy and move files _out_ of the directory, but you can't use it to copy or move files _into_ the directory. In order to do that, the only solution is to connect the device to a computer using USB, or to root your device.