AI will explain this to you if you really care to ask:
An abundance (post-scarcity) economy produces goods through technologies that drive the marginal cost of production toward zero, and distributes them primarily through free or near-free access rather than price-based markets.
Production: Advanced automation, AI, robotics, additive manufacturing (3D printing), synthetic biology, and abundant low-cost energy (renewables or fusion) enable highly efficient, decentralized, on-demand creation of goods. Once fixed costs (factories, designs, infrastructure) are covered, additional units cost almost nothing to make. Open-source designs and shared knowledge further lower barriers.
Distribution: With scarcity largely eliminated for many goods, allocation shifts away from money and markets. People access goods freely or via minimal-cost systems (public commons, universal basic services, digital platforms, or gift/collaborative economies). Pricing, if used at all, covers only residual scarcity or externalities rather than rationing supply. Examples already seen include open-source software, Wikipedia, and near-zero-cost digital goods.
Who is paying for the cost of raw goods or utilities/fuel needed for this? I have yet to see anyone remain alive on a daily diet of open source software, Wiki or digital goods. You can't just download a photo of a meal for dinner.