Is is possible to predict ncRNAs from sequence and homology alone?
Is there any conserved secondary structure in this RNA? One could align all known instances of this RNA and see if there is any significant covariation according to R-scape. That could serve as a computational signal that the RNA is real (although wet lab experiments would still be needed).
Another question is whether this RNA is already in Rfam? If so, then the job of making an alignment of known instances is easier.