Use this script in "User Data" section to enable SSM.
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#cloud-config
cloud_final_modules:
[scripts-user, always]
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#!/bin/bash
sudo yum install -y python3
sudo dnf install -y https://s3.amazonaws.com/ec2-download...
sudo systemctl status amazon-ssm-agent
sudo systemctl enable amazon-ssm-agent
sudo systemctl start amazon-ssm-agent
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