We are already in post-scarcity with regard to many information based services - there's so much music, literature, scientific papers, online courses, free Encyclopedia for all languages, open source software, open source models - more than we could ever consume. So many hobby communities and YT channels, with great people showing their work. Millions of software problems solved on StackOverflow, you can find almost any fix there. The internet itself exceedes our bandwidth and is post scarcity. This is how post-scarcity feels like. Everything is available but you got to make the first move.

But if we think about industry, even if we had 100% free energy and 100% perfect automation it would not mean we are post scarcity yet. We need to ensure the raw materials, either locally or from remote sources, or we got to recycle perfectly, or invent smart materials that can be produced locally. Economy is going to look like ecology, everything recycled and efficient.