Probably not exactly what you're looking for but i3 could be worth checking out. It's a tiling window manager with a powerful customization/scripting interface and it has a feature to save and restore window layouts. There's also Sway which is similar but based on Wayland though it does not have the save/restore feature.

Granted they might not be as easy to set up as installing PowerToys on Windows if you have specific expectations. (But it's not rocket science either.)