But isn’t the streaming module on N-01XD the same as on N-01, which is already Roon Ready certified?
The N-01 / N-05 network board supports up to DSD128 from network input. The N-01XD network board supports up to DSD512 from network input. They are very different.
Even if the network board were the same (they are not), Roon Labs have their own criteria to determine whether a new model needs to go through the certification process or not, based on other features.