So the standard YYF axles are Metric set screws at M4x0.7 as I’ve heard, but I can’t manage to find a drill at that, but I did find an ISO Metric screw drill so is it the same and are YYF axles compatible with it?
I have no idea
I don’t understand what you are asking. You shouldn’t need a drill at all.
But to answer the title of your thread, yes they are the same thing.
‘‘The design principles of ISO general-purpose metric screw threads (“M” series threads) are defined in international standard ISO 68-1.’’
So there you have it. ISO standards are used to define the standard metric screw.
And like vegabomb says, why do you need a drill?