For an AWS SAM template, I used a CloudFormation condition like so:

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: Example

Parameters:
  Environment:
    Type: String
    Description: Deployment environment
    Default: prd

Conditions:
  IsProd:
    Fn::Equals:
      - !Ref Environment
      - prd

Resources:
  ExampleScheduledFunction:
    Type: AWS::Serverless::Function
    Properties:
      Events:
        ScheduleEvent:
          Type: ScheduleV2
          Properties:
            ScheduleExpression: "cron(0 3 ? * MON *)"
            State:
              Fn::If:
                - IsProd
                - ENABLED
                - DISABLED

Reference:

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/conditions-section-structure.html

• https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-conditions.html

• https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-property-function-schedulev2.html