I want to delete some files from the Time Machine backup of my iMac running Big Sur. In Catalina and before, you can enter Time Machine, find the file you want to delete, right-click on it and the option is there to either delete that one instance of the file or all instances of that file from the backup. In Big Sur, those options are no longer there! There appears to few no way to delete individual files/folders from the backup. Am I missing something here?