Either that or the losing side of the Trojan War (or the Hittites?), or any combination of the above.
“or the Hittites?”
Hittites were definitely a different people, because we have records mentioning the various “sea people” tribes along with the Hittites, because the Hittites both allied with them (to fight Egypt) and then ended up fighting against them when the sea peoples gave up on Egypt and started attacking elsewhere.
The Hittites were contemporary with the Trojan and the Achean Greeks.
The ancient Hebrews knew the Hittites and the phoenicians so I think the sea peoples were a different group.
Many scholars think that Troy was a client state of the Hittite empire and that the Trojan war was a war between the ancient greeks and the client state (troy).
They had found some tablets referring to this when excavating the Hittite ruins. I think the Hittite name for Troy was Wilesa or something similar.
Actually this was 300 years after the Thera volcano. Perhaps some were people who left Knosos when that civilization collapsed. The volcano caused a tsunami which no doubt destroyed their ship building facilities and killed many of their skilled ship builders. While there were ships at sea which no doubt returned to port, the damage was too severe to maintain a strong maritime civilization, and it made sense to move from an island to a mainland.