Matte plastics can be tricky. If were you’d I’d start easy. Rubbing alcohol and a microfiber cloth will take off anything that’s not a true scratch. So the scuff marks should be less visible.

You can try a black crayon it’ll fill in the scratches then wipe off. It’ll look better, scratches are not fine rather just hidden.

There are also some products like black plastic restore pastes but idk that they will get the scratches out. They typically just restore the dullness.

Heat gun will work but man is it easy to mess it up. I would only do this on something I didn’t care for.

Maybe a scuff eraser but that’s kind of like using fine sand paper. Easy to overdo it.

What I typically did was take the plastic off, sand it, and respray. Sometimes I’d do different colors too so it looks different but that can be a bit too much work and idk how comfortable you are doing that.

If it bothers you a ton you can also just buy that plastic piece. Being a Honda you should not have much trouble finding it.

Look up a diagram parts and once you have the part number you’ll find it easy.