For accessibility purposes I want to create a view of Media images that do not have any Alt Text.
Creating a view of Media images and also displaying Alt Text is not difficult, as explained is this d.o post Media alt text not available in Views
However I do not know of a way to create a filter of 'Alt Text is NULL' so that a view can be built which only returns images without alt text.
Any suggestions for how could this be accomplished? Ideally this would be a view of media entities so that other filters relating to media can also be used.