The reason for the unknown is that a lot of the terracotta warriors have been found in pieces and some of those have painstakingly been put back together - but not all of them. The reason for this has been the collapse of tombs due to earthquakes and the disintegration of the wood in the tombs holding up the earth that covered it. In China there are still tombs to which these warriors are said to be in but have not been researched. If you ever looked into this a little more closely, that would have clearly answered your statement.
” If you ever looked into this a little more closely, that would have clearly answered your statement.”
Sheesh.