Yes! In Detective Comics 647-649 - I bought ten issues off Ebay to collect those three! But I think if you read the way the story structures Steph's introduction to Batman and Robin, she's clearly making a personal connection to Tim, and all of the reader letters a few issues later were focused on how Dixon should write Tim and Steph into a romantic relationship. And given that the story could easily have been an arc of Robin, and that's the same way Dixon approached writing Tim's first 100 issues, I think it's clear that Steph is a Tim supporting character in her introductory arc of Tec.
However, I agree with you that Steph is much more than that now, and it's frustrating that Tynion didn't do a whole lot more with her until the last two issues of the run. She did interact with Anarky, though.