Unfortunately, this data is harder to find than it should be. For instance, just looking at Kioxia, which I've found to be very performant, their datasheets for the CD series drives don't mention write latency at all. Blocks and Files[1] mentions that they claim <255us average, so they must have published that somewhere. This is why we would extensively test multiple units ourselves, following proper preconditioning as defined by SNIA. Averaging 250us for direct writes is pretty good.

[1] https://blocksandfiles.com/2023/08/07/kioxias-rocketship-dat...