'What could be the cause of Netlify React app long load time with empty gap of 10-11 seconds?

I have just recently launched a front-end React app on Netlify. The app, however, takes a very long time to load initially, ranging from 12-20 seconds. enter image description here

Upon every load, there is a gap around 12-16 seconds, where nothing is accomplished. I have incorporated Lazy Loading in the routes to speed up the process. This cut the time in half, as it was 30-40 seconds before. I have reduced the bundle size as well, but the improvement was not noticeable. Any ideas as to why this is occurring?



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