Magento 2 headless can help reduce frontend delays by sending only the data the page needs. The backend and frontend work on their own, so the page does not wait for a full build. The frontend pulls small pieces of data through APIs and shows them right away. This lowers the load on the server and speeds up the first view. Frontend caching can also make repeat visits faster. https://webkul.com/magento2-headless-development/