No, it doesn't. I know with 100% certainty ESP WiFi hardware is developed in-house and not shared. I think BL602 uses CEVA IP, not sure about that, but it certainly is not shared with ESP chips.
Sprite, how will Espressif react to this effort to open-source wifi? Will it help by releasing wifi phy documentation? Will it add DRM to block future efforts?
(sprite_tm works at Espressif)