here

create_instances.yml

- hosts: localhost
  vars_files:
    - aws_credentials.yml
    - aws_ec2_configs.yml
  tasks:
    - name: Installing Python pip
      package:
        name: python3-pip
        state: present

    - name: Installing boto3 Module
      pip:
        name: boto3

    - name: Provisioning EC2 instance
      amazon.aws.ec2_instance:
        aws_access_key: "{{ aws_access_key }}"
        aws_secret_key: "{{ aws_secret_access_key }}"
        region: "{{ region_name }}"
        instance_type: "{{ instance_type }}"
        image_id: "{{ ami }}"
        key_name: "{{ key_pair }}"
        count: "{{ count }}"
        security_group: "{{ sg_name }}"
        tags:
          Name: "{{ instance_name }}"
      register: ec2_data

    - name: Printing EC2 Data
      debug:
        var: ec2_data

    - name: Setting up private_ip variable
      set_fact:
        private_ip: "{{ ec2_data.instances | map(attribute='private_ip_address') | list }}"

    - name: Printing IP address
      debug:
        var: private_ip

    - name: Dynamically Updating IP address of EC2 instances in inventory file
      template:
        src: inventory.j2
        dest: inventory