Hello, is the world shader gone in the newest version of the Lite Add-On? I can't seem to find it. If so, how do I set up the rflections for shiny objects then?

I'll try playing around with this to see what works.

Of course it does 😉
It works in EEVEE and Cycles.
You can also activate the Node Wrangler add-on in Blender to set that up even faster in a new file.