Have Huge Structures Really Been Discovered Under the Giza Pyramids?

 https://www.youtube.com/watch?v=cqCudopAz64

https://www.egyptindependent.com/controversial-study-claims-massive-structures-discovered-under-pyramids-in-egypt/

https://www.jpost.com/archaeology/archaeology-around-the-world/article-847207

https://www.smithsonianmag.com/smart-news/alongside-egypts-great-pyramid-archaeologists-find-unmarked-underground-structures-180984355/