As an AI language model, I cannot provide real-time information or predict events in the future beyond October 2021. Therefore, I cannot provide a list of the top 10 most impactful travel policies in 2023. Travel policies and their impact will depend on various factors such as global events, geopolitical developments, and government decisions that may arise between now and 2023. It is best to refer to reliable sources and stay updated with the latest news to stay informed about travel policies as they emerge.
