The quick answer is, yes, all Rohingya are stateless at this point in time, and that is due to this discriminatory 1982 citizenship law that effectively stripped them of all their rights. They didn't used to be stateless. They were recognized as Myanmar citizens prior to 1982, but since then, the subsequent governments of Myanmar have endorsed this law, which we effectively want repealed. As for the conditions for the 600,000 Rohingya—
On December 10th, 2020. See this statement in context.