Enable to use EC2 longer ID format for all resources in all regions by using AWS CLI.

ec2_enable_longer_id.sh

#!/bin/bash
set -eu

# Change this as you want
PROFILE=default

# Check user ARN of the profile
USER_ARN=$(aws --profile $PROFILE sts get-caller-identity --query 'Arn' --output text)
echo "User ARN: '$USER_ARN'"

# Enable longer ID format for all resources in all regions
RESOURCES=(reservation instance volume snapshot)
for region in $(aws ec2 describe-regions --query 'Regions[].RegionName' --output text); do
  for resource in ${RESOURCES[@]}; do
    echo "[$region] $resource"
    aws --profile $PROFILE --region $region ec2 modify-id-format --resource $resource --use-long-ids
  done
done