I have plenty of 980 PRO 2TBs, bought them before I knew there was massive amount of fakes of them out there :- ). I could get them very cheaply (like 130 Euro) from one grey market supplier.
Half of them had latest firmware, half of them didn't. Samsung Magician will tell you and install the latest. Both should be fixed.
But the Magician apparently can't tell if they are genuine or fake..the firmware can fake this now. Didn't have time to run tests for comparisons. I mean they work, so :- ).
Truth be told, if I knew all this now (fakes, issues), I would just buy WD SN850 (or SN850X if you have more budget). Those are pretty much flawless.
Samsung was a household name for me for SSDs but looks like they don't care as much for QA for their non-enterprise drives. For how expensive they are..
I would never count on something to come at specific date, buy what is available.