Well, Burma had a port in previous versions of the game, and it suddenly disappeared in the new patch. I imagine that when adding new states to Burma, you missed the building unintentionally.
About the other two, the matter is not about historical, but about gameplay. All countries (at least all initial countries) should have at least one port, because if they become independent, they cannot trade resources or weapons, deploy ships, move troops through the sea or launch naval invasions. And the AI never build naval bases, so they will be isolated all the game.
However, if you want historical options to add a naval base, a good option for Syria would be Latakia (al-Lādhqiyya in Arabic).
en.wikipedia.org
And for Jordan, it has an unique coastal province. The port would be in the city of Aqaba (al-ʿAqaba in Arabic).
en.wikipedia.org
And as I previously said, in Burma just add the previous existing port.
Thanks for you work!