Likewise... but if you want a solid 60 FPS & you wanna see people, you might have to :( - But don't fret! It's extremely easy and you'll feel like a hardcore cypher afterwards for punching random numbers and addresses into your steamdeck and ps!
Also rocket league could be played on your ps too, remember... the ps just needs to be on and connected via ethernet to the router if do-able. It doesn't even have to be connected via video/hdmi once this is going. The steamdeck will be 'remote playing' the ps5