It appears that Rainbow Six Quarantine has been renamed. Thanks to some sleuth work and digging by MP1st, new images have been found that point to Rainbow Six Quarantine now being called Rainbow Six Parasite, and it seems to be coming relatively soon.
A file for Rainbow Six Quarantine has been found uploaded to the PSN as of February 9th, 2021, listing the game under the original title of Rainbow Six Quarantine and showing a patch version of 1.01. However, upon further digging by MP1st, images from the file seem to contain PS4 dashboard art as well as the boot screen players will see as they load up the game (header image above). Both of these images show the new name of Rainbow Six Parasite. 

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