Most betaflight FC do support pass-through, but otherwise then you need to use a USB linker and do each ESC one by one… Or the manual way using your RC controller.
However if you set it to use Dshot, then you dont technically dont need to do any calibration since this is digital (although the betaflght documentation says that it is best to still do a manual calibration before using Dshot just incase)
Sorry that I cant help much more as I am not very familiar with KISS stuff as I have never purchased one and we dont sell them either. That is not because they are bad… they are actually very nice but they do kind of force you to use KISS FC with KISS ESC and I am more of a fan of open source stuff. Although we will probably start selling KISS stuff one day as its on the long list of things to expand our catalog. Then one of us here will be a KISS expert. Anyways enough of my rambling on… Let me know if you figure it out or need any more help!