How to connect the Lambda function to the default VpcConfig ?

Description:

My project exist exists in one single VPC (default one) (account created way after 2013) I have a Lambda function that requests successfully data from a DynamoDB table. I created a DAX cache Layer (which was created in the same default VPC) For the Lambda function to be able successfully query DAX, instead of the DynamoDB I should configure its VpcConfig. I manage my services using cloud formation (JSON) - Amplify CLI

Question

I can hardcode the SecurityGroupIds and SubnetIds in the lambda VpcConfig and it works fine. But I want a way to retrieve these values dynamically (This cloud formation will be also used in different environments) from the default VPC Usually when I need a specific ARN or Name I just put it in the Outputs of the created resources and use it elsewhere But in my case I didn't create the default VPC (It's automatically created when the account was created)