I’ve never heard or seen either of those terms before reading this thread. What you’re calling “CNAPP” I’ve been calling “endpoint security”. I’ve been building internal “CSPM” tooling since 2014 with like raw cloud api calls feeding into graphviz, CI-like tests in a terraform repo, transforming the state of a set of cloud accounts into a form I can shove into z3 and ask questions about, that kind of thing, but never heard it called that.

I suppose if your company prefers to build over buy, you won’t be exposed to the kind of knowledge and vocabulary that buyers in the space use to orient themselves.