Well, Apple has a super weird bug tracker that you can report stuff but you are kept super in the dark - I remember reporting Safari bugs in the early days of WASM and it was zero communication until the bug got fixed.
No, I used Radar in the pre-NeXT days. I even still have the state diagram mug from when it was introduced in the early 90s. At that point it was a client-server app, because the web didn’t exist yet.
Now, it may be that the Apple bug database is always called Radar, regardless of implementation, like the Dread Pirate Roberts.
Radar was always Apple, I think NeXT had their own issue tracker called Recall. However when I worked on Rhapsody in 1997 issues were tracked with Radar.