You cannot change "bulbs" in most factory fitted LED headlamp assemblies because they don't use traditional bulbs.
I've had a couple of JDM Toyota hybrids with their LED packages and the entire headlight assembly is a single unit which uses integrated LED boards. That's why it's also so expensive to replace a headlight if it breaks because the entire assembly (including DRLs and turn signals) needs to be replaced.
Also, headlight assemblies are paired together so if you replace one, you likely have to replace the other as well, otherwise the car will keep complaining and show errors in the instrument cluster.
Have had to do this once for my own headlight controllers on my G-LED C-HR, and once for my friend's RX 450h where we just had to eat the cost of throwing away a perfectly good blaster unit because the car otherwise complained if the units weren't paired together from factory.