@headlessui/react@2.2.9 ships .d.ts files that import from react:

import * as React from 'react';

TypeScript resolves these types through @types/react, but the package only declares react and react-dom as peer dependencies — not @types/react. This works in flat node_modules layouts (npm, yarn) because @types/react is hoisted from the consuming project. When pnpm hoisting is disabled (hoist: false), TypeScript cannot find the React types and fails with:

error TS2307: Cannot find module 'react' or its corresponding type declarations.

Workaround:

packageExtensions:
  "@headlessui/react@2":
    peerDependencies:
      "@types/react": "*"

Suggested fix: Add @types/react to peerDependencies in @headlessui/react's package.json.