Help with getting Laravel Octane to work when using CDK instead of the serverless.yml?

[vesper8]

I chose to go with the Python CDK because I'm building something quite complex and I felt like doing it all through serverless.yml wasn't going to cut it in the long run.

Here's how I currently set up my lambda function with redis support

    def create_lambda_functions(self):
        self.laravelLambdaHttpApi = self.create_lambda_function(
            self.config["lambdaHttpFunctionId"],
            "public/index-serverless.php",
            [
                lambda_.LayerVersion.from_layer_version_arn(
                    self,
                    "BrefPhpHttpFpmLayer",
                    "arn:aws:lambda:eu-central-1:534081306603:layer:php-83-fpm:13",
                ),
                lambda_.LayerVersion.from_layer_version_arn(
                    self,
                    "BrefPhpHttpRedisExtensionLayer",
                    "arn:aws:lambda:eu-central-1:403367587399:layer:redis-php-83:1",
                ),
            ],
            self.appEnvironment,
            self.vpc,
            security_groups=[self.lambda_sg],
        )

    def create_lambda_function(
        self, id: str, handler: str, layers, environment, vpc, security_groups
    ) -> lambda_.Function:
        return lambda_.Function(
            self,
            id,
            runtime=lambda_.Runtime.PROVIDED_AL2,
            handler=handler,
            code=lambda_.Code.from_bucket(
                self.artifacts_bucket, "build_backend" + "/" + "build_backend.zip"
            ),
            layers=layers,
            timeout=Duration.seconds(60),
            environment=environment,
            vpc=vpc,
            vpc_subnets=ec2.SubnetSelection(
                subnet_type=ec2.SubnetType.PRIVATE_WITH_EGRESS
            ),
            security_groups=security_groups,
        )

I would like to experiment with replacing php-fpm with Octane. And I'd like to also experiment with BREF_LOOP_MAX and OCTANE_PERSIST_DATABASE_SESSIONS

Could anyone please give me a little guidance on what I arn layer I need to use and how to pass set two parameters?

Many thanks!!