Miqo’te are not native to Othard and they would be an odd sight and assumed to be a foreigner. During a quest (carpenter?), an NPC in Kugane seemed surprised by one. In Kugane, they also seem to use elezen, lalafell, and miqo’te as representations of western tourists since those races are only native to the west.

As for viera, they almost never leave home and those who do seem to stay in Dalmasca. The only one we’ve seen who has left both their native home as well as Dalmasca was a resistance member captured by the Garleans, taken to a prison in Ilsabard, then escaped to Eorzea.

All that being said, it’s a wide open world and you can be whoever you want and be born to miqo’te sailors who stayed in Kugane or a viera who left the wood and kept traveling east to escape the Garleans. But either race would still stick out in the Far East.