Hello mate. I know - not many mappings for the DDJ-RR and Traktor. I had to create my own.
I didn't want to start from scratch, hence I downloaded this mapping for the DDJ-RX (https://maps.djtechtools.com/mappings/6559) and customized it. The 2 controllers are pretty similar so not much work to do.
The main difference with my mapping is the addition of the ECHO pad effect effect (same as the Rekordbox).
Happy to send you my mapping via email if you want.