Yes. You didnt 'remove' the files from the Ventoy USB drive, you simply moved them to a Trash folder.
You can configure Ventoy to only list files kept under a base folder - e.g. /ISO/ if you dont want it to list all files in all folders.
You can configure Ventoy to only list files kept under a base folder - e.g. /ISO/ if you dont want it to list all files in all folders.