Ask HN: How do you distribute iOS apps internally?

Our organization has gotten big enough that we've run out of App Store Connect users, and waiting for iOS beta review is slowing down our dev/release cycle. We'd like to be able to build and distribute our app internally to product, design, stakeholders, etc, but I'm not sure how to go about this.

I know some companies use the Apple Developer Enterprise program for this, but I vaguely recall a few companies being kicked out of that program because it's not designed for internal testing.

So, how do you distribute iOS apps internally once you pass the 50 user App Store Connect limit?