Copper Door Lock

Playing around in the new 1.21 experimental snapshots, I find myself thinking about how the copper door is a missed opportunity. It's just another wooden door right now, with a new texture. Either making it behave like an iron door (where only redstone can move it) or giving it entirely new functionality would be great!

My proposed functionality would be a hybrid of the iron and wooden doors, where when the door is unpowered by redstone, it can be opened or closed by players like normal, but powering the door would lock it in place. This could be reversed too, where the door is only player operable when powered, the way around isn't super important to my mind, it just seems like a really cool idea.