why on the inmate bop locator they dont have a projected release date?

When the release date says, "Unknown", it could mean a few different things. One, that the calculation on their sentence has not been put in the system; two that the inmate has cooperated with the government and is awaiting the sentence reduction; three that they have RDAP and the adjustment has not been done yet; four that they have a detainer and are awaiting additional charges to be added and then determined.