The traditional guideline is that a quick-release should be closed hard enough to leave an imprint in your palm as you close it. Opening, will be whatever it is.
It is recommended NOT to use a q/r with an open cam - as yours - on disc brake fronts, as braking does create a force that will try to eject the wheel. Internal cam q/r have a greater pinch force for a given amount of hand effort and does a better job of keeping he front wheel secure.
And no, there’s generally nothing like a repeatable, tested torque value.
It wouldn’t be horribly difficult or expensive to create such a q/r, but apparently the current system is considered adequate, flawed as it is.