I’m part way through a BQ50Z50-R2 design, and one thing to be aware of is that it takes quite a lot of programming (I.e. there are many settings).
One of these is the Chemistry ID, which you find by doing discharge testing of a sample cell and submitting a test log to the TI website. This can take some time to do and there’s a chance that TI won’t have a Chemistry ID, so I suggest you get onto it pretty quickly. (I think if they don’t have a Chemistry ID they could possibly make one, but i suspect that involves weeks of testing.)