Minecraft: Corner stair without adjoining step?

Is it possible to get a corner step (through console commands or glitches), which does not require adjacent steps?

Or invisible stairs that are placed next to another step so that it becomes a corner step?

You should actually be able to place a corner step with other steps and break down the other steps and the corner step should remain

Then it will spring back to its original shape…

Not at my place

Which Minecraft version do you play?

1.12

Bedrock or java edition?

/Java

You could work with commands

I also considered, but found none that gives me a square step

/ setblock ~ ~ ~ stone_stairs 0

You have to change the 0 at the end by 1 2 3 etc to determine direction and angularity