I am not sure if I am doing this wrong, but a search in you manual suggests I am not. How about a way of the objects with reflected surfaces reflecting other objects in that scene.

It’s limited to screen-space but the option is called “Reflection (SSR)”, in the postprocess menu.

Don‘t forget that your object material needs to be reflective as well. If roughness is on 1 like with right plane, reflection can‘t work like expected.