Suprisingly it does. It says on the label that it has Samsung 30Q cells (although in OP’s pics it is faded, you can check it on the Ownboard website). I have an Ownboard kit with the same 6.0 battery, and it had the 30Q label as well. I haven’t removed the shrink wrap to check for sure, as I want to sell the board or the parts eventually once I finish a build, and don’t want to ruin it. The discharge current listed on their website does match up with the 30Q cells as well (officially rated for 30Ah)
There is barely any voltage sag under load except last 30-ish percent, and the range is as expected, so I am pretty sure they are genuine cells, but at the same time I am not too heavy and don’t accelerate too hard since I use a 27" deck.