Does the term “fresh off the boat” only apply to Asian immigrants or immigrants in general?

At first I always thought it was just meant to be a broad expression (or slur) that describes new immigrants rather than just one specific group of immigrants. However, even Wikipedia’s description of the term seems to suggest otherwise. I know there’s that Eddie Huang comedy that popularized the term more than ever before based on his own life too. Or can FOB still mean that too?