amplify-cli: Federated Facebook login does not call Post signup lambda trigger

Before opening, please confirm:

• I have installed the latest version of the Amplify CLI (see above), and confirmed that the issue still persists.
• I have searched for duplicate or closed issues.
• I have read the guide for submitting bug reports.
• I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.
• I have removed any sensitive information from my code snippets and submission.

How did you install the Amplify CLI?

No response

If applicable, what version of Node.js are you using?

No response

Amplify CLI Version

7.6.5

What operating system are you using?

Ubuntu

Did you make any manual changes to the cloud resources managed by Amplify? Please describe the changes made.

Attached a lambda for Post confirmation in Cognito

Amplify Categories

auth, function

Amplify Commands

Not applicable

Describe the bug

I want to do some setup after a user is created. For this, I am using post confirmation trigger. The normal email signup calls the post confirmation trigger, but FB signup does not.

Expected behavior

post confirmation trigger should be called for FB signup too.

Reproduction steps

1. Attached a lambda for Post confirmation in Cognito
2. Do FB signup

GraphQL schema(s)

N/A

Log output

# Put your logs below this line

Additional information

No response