Fair enough (something went wrong with your image), and I suppose it makes sense that they should exist - but, as I said, I've never seen one. In any event, as you go on to say ...And you can get male inlets with hinged covers if they are to go outside
I haven't seen one of those, either - which would make it rather difficult to connect anything to the former!...and I'm trying to think if I've ever seen a trailing female connector without a cover...
... and what about at the garage end - have you seen a male trailing connector with a cover? (I haven't).
Kind Regards, John