as promised here’s the screenshot of my setup

In my oppinion

You can use the ssd as the root partition, then mount the hdd as your home partition.

If you meed to store large file, you can dump it to the home partition

Then mount the nvme as /data01 or something else

Then when in steam, you can add new location to tell steam where to put / searchf for your game

Ill post a screenshot later

Can you share the documentation on how to enable tiling on kde?

I just cant make it works :(