It says on the official Raspberry Pi website: Are you discontinuing Zero and Zero W? No. We seldom discontinue products, even where they have been superseded

It says on the official Raspberry Pi website: Are you discontinuing Zero and Zero W? No. We seldom discontinue products, even where they have been superseded by more modern product at the same price point. Zero 2 W is $5 more expensive than Zero W, and joins the Zero family as a third member. Note that Zero and Zero W are currently experiencing supply constraints in the context of the global semiconductor shortage. We hope that this will be resolved in 2022.