If I am not mistaken, she was resurrected in an episode of The Mandalorian.
But anyways, I think she ought to have stayed dead. Boba Fett did not need a partner in the Original Trilogy, and he does not need one now. If it were not for her constantly stealing opportunities to do important/impressive things from Boba, TBOBF would have been a hell of a lot better.
If there is one upside to it though, Ming-Na Wen is cool, and I am glad to see that she has not faded into irrelevance at an age where many talented actresses like her get passed up in favor of younger ones.