Ways to cover up a hole in metal siding
Get yourself a bit of aluminum coil stock. Find a color that you can live with, or also pick up some spray paint in flat.
Cut a rectangular piece that's as wide as the damage plus 2&quot;, and as long as height of the siding face plus 2&quot;.
Using a scrap board with fairly sharp corners, bend the sheet so that it fits the profile of the siding. You want it to to cover the underside of the plank above the patch, the face with the damage, and the underside below the damage.  Trim length as needed.
Check your fit and the overall appearance, then drill into the underside planes for pop rivets or sheet metal screws. If needed, flex the patch so it lays well against the siding.
Paint the patch piece if necessary and let it dry well.
Apply a bead of silicone caulk around the top and sides of the damage (not below).
Press the patch in place and fasten it.

If you find that the width of the fastener area is too narrow for comfort, go ahead and rivet from the face four or six times. You could then make the patch just cover the face and underside below the damage. Put some caulk behind the rivet points to seal them.