Thanks for your interest in the RealNoiseMRI challenge. The challenge is now closed and the data has since been anonymized and is publically available!
The data is distributed on Openneuro: https://openneuro.org/datasets/ds004332 and while there's a description there, there is also a preprint on PsyArxiV with lots of details: https://psyarxiv.com/vzh4g
The scripts to reproduce the results are on our MoCo GitHub: https://github.com/melanieganz/MoCoProject
There are still minor details missing, but check it out and reach out to me personally under (mleanie.ganz@nru.dk) if you have any questions!