See the folders in the repository, each is a separate simulation release.
For more details about the available simulated data, please refer to the:
CMB-S4 x LiteBIRD Simulation plan document available in the CMB-S4 x LiteBIRD shared Google Drive folder.
In order to access Google Drive you need to be a member of the cmbs4xlitebird mailing list / Google Group and logged in to Google with the same address.
If you are in CMB-S4, you can join the group from your team-login page, if you are in Litebird, please contact Toshiya Namikawa.