It doesn’t meet the minimum recommended hardware specification as defined by Roon Labs:
Using a NAS to act as Roon Core only, no other functionality or software used from it, sounds strange to me as a NAS and its OS are designed and optimized with other purposes in mind and therefore not ideal for the task as Roon Core – better use a NUC with ROCK instead.
If you plan to use your NAS for other things too, it might act lame and/or sluggish at times or you might even loose connection to it and/or music stops playing. IMO the two core processor can become a real bottleneck here. Also the Roon DB should reside on a SSD for good performance while the actual music files, if you have any, can reside on a HDD. But a HDD might also become a bottleneck if other processes on the NAS are also using it (heavily).
So I wouldn’t expect too much from Roon on this NAS.