Yes that's true there is no concrete evidence, if we were to find Sardinian pottery in Egypt itself I'd consider that more or less a proof, but for now there is only evidence of indirect trade between Sardinian/South Italy and Egypt during the LBA, and the evidence of direct trade is for now only for Sardinia/South italy with Cyprus and the Aegean. However I have to specify one thing. The South Italian pottery found in Greece and the Levant is not only imported but also locally made suggesting the presence of individuals from those regions during the 12th-13th century bc. Of course this doesn't mean that since they were present in those places during that time period they were one of the sea peoples, they might as well have been peaceful merchants who came either aboard their ships or aboard Mycenaean or Cypriot ships.What do you mean the Ahhiyawa located in Cilicia? Did the Ahhiyawa go to Cilicia?
Is there really a distinction between "of the sea" and "of the countries of the sea"?
Pretty sure that "countries of the sea" refers to coastal Anatolia.
I'll comment on the Sherden. There isn't really any evidence that connects them with the Western Mediterranean. At best there is the claim of archaeological remains (pottery basically) in Greece which are supposedly from that area of Sicily and Sardinia. But that is easily explained as trade. One could just as easily claim that horned helmets and straight swords in these depictions are similar to that of various Anatolian cultures.
There's no evidence for this either, the only people who we know for certain were from coastal Anatolia, that is the Lycians, were never called "of the countries of the sea", unlike some other sea peoples.Pretty sure that "countries of the sea" refers to coastal Anatolia.
Unfortunately we only have figurative art from Cilicia and Eastern Anatolia during the early iron age, but almost none for the late bronze age, and none at for either period all for Western Anatolia except the Karabel relief from the LBA.. One could just as easily claim that horned helmets and straight swords in these depictions are similar to that of various Anatolian cultures.