You're averaging right around 1ppm/1k miles of Fe, and the other wear metals are so low they are not worth discussing. You can try 5w-30, but just how much "better" do you think it might get, anyway? And this is with only 20k miles on the vehicle? Your wear is so absurdly low that you'll probably wear this engine out, in another 980k miles ....
Think I should change to a 5W-30 or keep it the same? I replaced it with another around on M1 EP after this sample was taken.
If your Tacoma sees mostly light duty, I would keep using the M1 EP 0w20. If you do much hauling/towing, drive aggressively or have high ambient temperatures (100F+), you might switch to a 5w30 but ONLY if allowed under warranty.