You can find some concise information about related Fuji filter here: https://encyclopedia2.thefreedictionary.com/Super+CCD.
Furthermore, a specificity from DxO RAW processing is also to get some processing before demosaicking (for instance denoising), and this required to have a specific implementation of these filters (and a specific maintenance across time) in case of Super CCD.
For more information about this last point, it’s a little like discussion we also have about the fact that we don’t support XTrans sensor (cf. post here: Fuji X (T20) RAW support in OpticsPro). (but yes, Super CCD case was simpler, as it can be seen as Bayer filter stored with a 45° rotation).