They had some pretty advanced shipbuilding at any given time when compared to the Mediterranean. I know they couldn’t have been Hjortspring or Nydam ships since those came around several hundred years afterwards.
If I recall correctly, the Sea Peoples used different types of weapons than other Mediterranean civilizations. I’m not sure if that applies to the ships themselves as well.
It’s just a thought that popped into my head and I’m curious if it’s possible
There is always more to say, but u/DanKensington did a useful roundup of AH resources on the Sea Peoples here a few months ago now. You might like to visit that page and review some of links gathered there while you wait for fresh responses to your question.