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Please provide as much information as possible. At least, this should include a description of your issue and steps to reproduce the problem. If possible please provide a summary of what steps or workarounds you have already tried, and any docs or articles you found (un)helpful.

Problem you have encountered:
When using App Engine Standard with Java 11, it is not possible to trigger a function that only allows traffic from the same VPC network.


What you expected to happen:
- To be able to trigger the function


Steps to reproduce:
- Use App Engine Standard with Java 11
- Create a VPC Access Connector to trigger a Cloud Functions function that only allows traffic from the same VPC network from App Engine Standard
- Receive 403


Other information (workarounds you have tried, documentation consulted, etc):
- We tried to create a VPC Access Connector [1] to achieve it but it is not possible because requests must use the external address of your serverless service. [2]
- It is possible to connect App Engine or Cloud Functions to other resources but not between them. [3]

[1] https://cloud.google.com/vpc/docs/configure-serverless-vpc-access
[2] https://cloud.google.com/vpc/docs/serverless-vpc-access#:~:text=serverless%20vpc%20access%20only%20allows%20requests%20to%20be%20initiated%20by%20the%20serverless%20environment.%20
[3] https://cloud.google.com/vpc/docs/private-access-options?&_ga=2.117117062.-1673936480.1621885978#supported_services