My parents made one at the house where I grew up in NJ
We had one at our house in Chapel Hill, and when we rebuilt after the fire there in 2007, we extended the rock wall to make more to go along with the design of the new house. Real rock.
When I bought this house in a new development in 2020, the lot next door was graded quite a bit higher than mine. I was going back and forth with the builder about the angle of the drop between the two lots and about to hire a lawyer to make the builder put in a retaining wall, when I came over one weekend to look at the progress on the construction of my house and voila! There was the wall, with no input from me about it. The retaining wall actually is on the neighbor's property. But the way our courtyards are set up, I can landscape within parameters of the CC&R's, or, with approval from the HOA Architecture Review Committee for something like the rose trellis.
So, it's not the rock garden I'd have if I were in complete control of the space, but it will do.
Happy to have stirred your memories.