I want to do code chunking / splitting in my PCF to reduce the load time. However, it doesnt seem to be working even if all syntax is correct. It loads the whole bundle at once. Can you tell me whats missing here?

I want to do code chunking / splitting in my PCF to reduce the load time. However, it doesnt seem to be working even if all syntax is correct. It loads the whole bundle at once. Can you tell me whats missing here?