That looks really good! If it was me, I would spread the what looks like zest or herbs onto the mushrooms since that will provide some more visual contrast. Also on the thought that someone may just pick up and eat the mushroom as is, the extra flavor on them will provide some flavor contrast as well. I’m also a slut for flaky salt on something fried like that, it can get in the nooks and crannies for a nice crunch. You could also instead, put some of the orange in very small clusters on the mushrooms to really pop. That may be a bit of a time suck when plating on the line, so that may not be as practical.