In Qt Creator's Projects view in the sidebar, .qrc files show up as leaves in the tree, and cannot be expanded.
However, they contain groups of files in a hierarchy, and so it would be convenient to be able to expand them, and double-click files to edit them.
For instance, if I have a .qrc with a bunch of HTML help files, I might like to see the list and double-click one to open it in Qt Creator's text editor.
Right now, even if I open the .qrc file by double-clicking it, I still can't open any of the files in it by double-clicking on them, so you can count that feature request as part of this issue also.