In my opinion, the only real way out of this is for companies to offer their own security-approved solution. This might take the form of an internally-hosted model and chat interface, or one pointing to Microsoft Azure’s OpenAI APIs (Azure having more enterprise friendly data security terms).
This article says Apple is working on their own LLM, and presumably they’re offering that for employees to test, but many other companies are simply closing their eyes and trying to pretend it doesn’t exist.