dd works on the block level so it doesn’t care about your filesystems or partitions at all. It simply copies it all byte by byte.

Simply use df to verify your disk names
df -h

And then use dd to copy input file to output file where if is your old disk and of is your new.
dd if=/dev/sda of=/dev/sdb

I would probably install the new ssd and then boot from a live usb and run dd from there. Then you can use your partition manager in tumbleweed to enlarge the partition afterwards.

Lutris is impressive when it comes to game launchers and RAM efficiency, especially when compared to the ones using Electron.