Yes, but higher BKB normally doesn't impact KO percent nearly as much as KBG, except in the cases of smashes, and those typically have both high base damage and moderate KBG.
For example, Luma's sweetspotted UTilt starts launching incredibly far even at 0%, though it doesn't KO Robin until around 130%.
On the other hand, Ness's BThrow doesn't start applying significant amounts of KB on Robin until around 60%, but it can KO him around 95% at the edge and around 130% from the center of the stage.
What I said is just a general guideline for eyeballing changes in KB values for moves with "average" damage outputs (something like 8%-12%). If a move applies a lot of KB at 0%, then it's obvious it has high KBG. If the amount of KB applied increases rapidly, then this is because it has high KBG.