I have a question on generating multiple entry points for my library using tsup as I'm having trouble getting them to work. My intent is to have the following type of imports

import { ... } from "@org/myLib"  // entry 1
import { ... } from "@org/myLib/subModule" // entry 2

To achieve this, I am doing the following in my tsup.config.ts

import { defineConfig, Options } from 'tsup';

const CORE_OPTIONS: Options = {
  outDir: "dist",
  format: ['esm', 'cjs', 'iife'],
  target: ["esnext", "node18"],
  sourcemap: true,
  minify: false
}

export default defineConfig([
  {
    ...CORE_OPTIONS,
    name: "myLib",
    entryPoints: ['src/index.ts'],
    dts: {
      footer: "declare module '@org/myLib'"
    },
  },
  {
    ...CORE_OPTIONS,
    name: "subModule",
    entryPoints: ['src/subModule.ts'],
    dts: {
      footer: "declare module '@org/myLib/subModule'"
    },
  },
]);

And in my package.json I have the following exports configuration:

{
  "name": "@org/myLib",
  "version": "0.16.10",
  "description": "...",
  "type": "module",
  "main": "./dist/index.cjs",
  "module": "./dist/index.js",
  "browser": "./dist/index.global.js",
  "types": "./dist/index.d.ts",
  "files": [
    "dist"
  ],
  "exports": {
    ".": {
      "import": "./dist/index.js",
      "require": "./dist/index.cjs",
      "types": "./dist/index.d.ts",
      "script": "./dist/index.global.js",
      "default": "./dist/index.js"
    },
    "./subModule": {
      "import": "./dist/subModule.js",
      "require": "./dist/subModule.cjs",
      "types": "./dist/subModule.d.ts",
      "default": "./dist/subModule.js"
    },
  }
}

This is all done inside of a pnpm monorepo workspace where each package establishes their dependency via use of workspace:^. Despite the above configuration, I cannot get the second entry point "@org/myLib/subModule" to be recognized no matter what I do. It appears I must be misunderstanding something with regards to properly setting this up. Can someone please help me resolve this?