Tut's mask is seen to have pierced ears. This is not how Carter found them. Originally the piercings were covered by a very thin sheet of gold leaf that was damaged and subsequently removed. This led to the first instance of speculation that the mask was originally intended for someone else; perhaps his stepmother / mother-in-law Nefertiti. His sudden and unexpected death at the age of 18 or 19 resulted in a fair amount of repurposing, including his tomb, which was believed to have been for someone of a far lesser class.
The gold-covered chest with the lion motifs is clearly no Egyptian but perhaps Hittite. The Hitites were the main rivals of Egypt and had on a number of occasions soundly defeated the Egyptian army. It is likely that this chest was seized from the Hittites during a battle in which Tutankhamun was involved, which is why it would be entombed with him.
As stated, there is much speculation about the cause of Tutankhamun's death. Among other things, they found a common parasite in his system that could have caused issues, plus other things. Considering the damage to his rib cage, which runs roughly diagonal across his chest and over the heart area, and taking into account the injury at the back of his head, as well as his misshapen spine (a family trait), it has been suggested that he had been on a chariot traveling at a fast speed, hit a bump of some sort and, perhaps due to reduced mobility caused by his spine, he may have fallen from the chariot, hit his head and been run over by a chariot that had been behind him. This is all circumstantial, but it does jibe with the concept that he may have died in battle.
The illustrations of tumultuous and violent battles with dark-skinned enemies from Nubia in the south are suggestive that some of the revisionism that has taken place over the past century may have been disproven to some degree. As Africa is a huge continent, occupying a space five times that of the contiguous United States, the notion that the population is all from variants of the same "race" is not a well-supported theory. Modern Egyptians have been known to view some depictions of their ancient royalty as being cultural appropriation. When, for example, Louis Gossett Jr. was cast as slain Egyptian president Anwar Sadat in the miniseries, Sadat (1983), Egyptians protested at the depiction of the iconic figure by someone having roots elsewhere on the continent.