Please follow the steps below to add a new tester to the closed testing phase of your app in the Google Play Console:
1. Go to the Play Console.
2. Select the app.
3. Click on "Closed Testing."
4. Select "Closed Testing Phase 1."
5. Navigate to the "Testers" section.
6. Click on the arrow button next to the email list.
7. Enter the new email address and hit the "Save" button.
8. Scroll down to find the "Join on the web" option.
9. Copy the provided link and share it with the new tester.
Please note: The new tester must log in to the Play Console using the same email address that was added to the tester list. Once logged in, the tester will be able to download the app.