In classic SE the way to quickly move files from one folder to another was to:

Tap + Hold on destination folder and click "Open Beside" to open it in the side panel.

Then you could send files to the background (or side panel depending on orientation) very quickly and easily.

In the new version you must navigate to the destination folder in a separate panel since the "Open Beside" option is missing.

Please bring back the "Open Beside" option!