The ‘Sea People’ were a few centuries later, and they were the classical Greeks; the Philistines were dying out during the early kingdom period in Israel, and the Hurrian and Greek influence predominated.
The Classical Greek period of Homer and Plato was about 400 BC, 800 years after the Greece of Agamemnon that Homer wrote about.
Some historical events associated with the “sea people” at about 1200 BC: the invasion of Egypt by the sea people, the destruction of the Minoan civilization in Crete, and the sudden disappearance of the Hittite and Mittani empires Empires in Asia Minor and the Middle East.
Here’s the sum of what I have read about the sea people . They were active the eastern Mediterranean around 1200 BC or thereabouts. The early Greeks that Homer wrote about (many centuries later) were one of these sea people. The classical Greeks of Socrates, Plato etc lived at around 400 BC.
The Sea People were analogous to the Vikings with their hit an run raids. Some of them settled down and established countries, like the Vikings did in England and Normandy. But unlike the Vikings, the sea people were motley groups of various people with unrelated languages They they enriched themselves by attacking the eastern Mediterranean, because that’s where the money was. The Philistines who invaded the levant and mixed with the Canaanites were another sea people. Another group of sea people invaded Egypt in force.
This free for all in the Eastern Mediterranean may have begun with the sudden overthrow of the Minoan civilization on the island of Crete. Crete was the main commercial power in the Mediterranean (something like England was when they ruled the waves a couple hundred years ago). Somebody decyphered the writing of the invaders in the 1950’s and it turned out to be the early Greeks.
The Hittite Empire suddenly disappeared at about this time. The culprits were believed to be the Phrygians, another Indo-European people that invaded Asia minor. Homer’s Trojans were another “sea people”.