Why would you need to sign an NDA? There are decaps readily available. Most ESP32 models have a separate die for the flash memory, but everything but the flash (that is uC, WiFi, BLE, and peripherals) is on a single die, which sounds like a SoC to me (The definition of SoC devices have always included devices with off-die RAM and Flash). These aren't "a bunch of components on printed circuit boards" as you initially claimed.
https://electronupdate.blogspot.com/2018/08/espressif-esp32-...