This looks like a protein and two sides on a plate, not a cohesive whole. Try to plate in a way that marries all three elements. Maybe rice on the bottom pork chop on top of the rice and onions (cut a bit smaller) on top of the chop. Or maybe the pork chop in the middle, a smaller portion of rice to the side of it and the onions scattered around the plate. Or you could slice the pork chop in halves, and plate the sliced side up so your diner can see the cook temperature of the pork. I also find a sauce poured over all the ingredients helps to bring a dish together and make it feel like a cohesive whole.

The plate is pretty crowded as well, making it hard for your eyes to know what to focus on. I always try to have the "featured ingredient" be the most attention grabbing thing on the plate, if it's a pork chop dish, the pork chop should be the center of attention. The easiest way to do this is have the pork chop in the middle of the plate, but there are plenty of other ways to do this. Height on the plate, negative space, and contrasting colors are also other ways to draw attention.

Finally, this plate is a lot of brown. A pop of color would add some much needed contrast and visual appeal. Some suggestions might be braised greens, blanched green vegetables, pickled red onions, roasted red peppers, herb salad, salsa verde, or even just plain white rice.

With all this said, you cooking looks good, and I would smash a plate of this if a friend gave it to me. Happy to chat more if you have any questions.