I think the question posed by the OP is probably more, "Are there even ports and ships in western Othard that could and would ferry Xaela to Eorzea?" There's no doubt that many Xaela would want to get out from under Imperial rule; the question is not why but how, as in, "how does a Xaela go about getting off Othard and making his way to Eorzea?"
The continent of Othard has been under the Empire's control for a long time (approx. 60 years max, as new lore dates the Empire's conception at 1522) so no port under Imperial authority would willingly ferry Au Ra to Eorzea. The Domans got away with it because they rebelled and (presumably) either had their own ships or stole them... but Xaela tribes aren't as unified, and they're nomadic, and not all of them are coastal (many being landlocked in the steppes/deserts by choice), and whether the coastal tribes are capable of seafaring vessels is another question, as is "if not the coastal Xaela, then who?"
EDIT:
A quick review of the 51 tribes shows that only the Jhungid, the Kharlu, the Mankhad, and the Haragin tribes are coastal, and of these only the Haragin have ever built a seafaring vessel that took them to other lands and that was in legend. There are a number of river tribes that use small boats, but that doesn't qualify as seafaring.
The continent of Othard has been under the Empire's control for a long time (approx. 60 years max, as new lore dates the Empire's conception at 1522) so no port under Imperial authority would willingly ferry Au Ra to Eorzea. The Domans got away with it because they rebelled and (presumably) either had their own ships or stole them... but Xaela tribes aren't as unified, and they're nomadic, and not all of them are coastal (many being landlocked in the steppes/deserts by choice), and whether the coastal tribes are capable of seafaring vessels is another question, as is "if not the coastal Xaela, then who?"
EDIT:
A quick review of the 51 tribes shows that only the Jhungid, the Kharlu, the Mankhad, and the Haragin tribes are coastal, and of these only the Haragin have ever built a seafaring vessel that took them to other lands and that was in legend. There are a number of river tribes that use small boats, but that doesn't qualify as seafaring.