Not able to access environmental variables created during a Setup project in custom reporter.

Trying to move away from global setup to project dependencies --https://playwright.dev/docs/next/test-projects#dependencies.
I have a setup project which executes first. Then a project (e2e) for executing the tests. And then a cleanup project. I am setting up an environment variable process.env.FOO for the first time in one of the tests in the setup project. This variable's value is accessible in the tests in e2e project and also in the cleanup project. I have a custom reporter that implements playwright's reporter. But i could not access the environmental variable process.env.FOO in this custom reporter. It is undefined in onEnd , OnTestEnd for all the tests, in all the projects. Not sure if this is a problem with how playwright is handling the environment variables or problem with my code. Appreciate any help on this. Given the snippets below.

playwright.config.ts

require('dotenv').config();
export default defineConfig({
...
...
reporter: process.env.CI
    ? [
        ["./src/helpers/CustomReporter.ts", { outputFile: "results.xml" }],
      ]
    : [
        ["html"],
      ],
projects: [
    {
      name: "Setup",
      testMatch: "**/AdminLogin.setup.ts",
      teardown: "Cleanup",
    },
    {
      name: "e2e",
      testIgnore: ["**/*.Login.setup.ts"],
      dependencies: ["Setup"],
    },
    {
      name: "Cleanup",
      testMatch: "**/Termination.cleanup.ts",
    },
})

AdminLogin.setup.ts

import { test as setup } from "@playwright/test";
setup("Login as admin", async ({ page}) => {
process.env.FOO = "21"
})

CustomReporter.ts

class JUnitReporter implements Reporter {
  onBegin(config, suite) {
    console.log('onBegin process.env.FOO = ' + process.env.FOO)
  }
  onTestEnd(test, result) {
    console.log('onTestEnd process.env.FOO = ' + process.env.FOO)
  }
  onEnd(result) {
    console.log('onEnd process.env.FOO = ' + process.env.FOO)
  }
}