Hi,
I don't know if it's possible, I've enabled an action on the top left of the screen , where all windows are shown
The problem is that placement is random and untidy , is there a way that every window is tiled equally when showing all windows ?

Don't think so. The defaults, overview and present windows..not. You'll need a kwin script...If it's available that is. Parachute doesn't do it so you might want to search a bit if there is such a script available AND, if it has a corner binding option as well. But, top of my head, I doubt there is such a script. As a sidenote. It's a pitty they didn't give overview some more attention. Because currently, I think it's a pretty useless and very limited function. At least present windows has an all desktop option and parachute even had more functionality.
This was Parachute. But it is discontinued and no longer works in 5.24. https://imgur.com/a/rD4LYeb