This script will capture current terraform states then output a ps1 script to run and import them

genmoveterraformstates.sh

# Extract the identifying URLs using terraform plan
terraform  plan | grep "Refreshing state" > terraform-current-states.txt
# Extract the states we know from the configuration
terraform state list > terraform-state-list.txt

# Subscription strings
OLD_SUBSCRIPTION=00000000-0000-0000-0000-000000000000
NEW_SUBSCRIPTION=11111111-1111-1111-1111-111111111111
# Resource group strings (other name)
OLD_RG='Rg-appname-TST'
NEW_RG='Rg-appname-TST'

# Iterate over state list
cat terraform-state-list.txt | while read RESOURCE; do
  AZURE_ID=$(grep "${RESOURCE}"  terraform-current-states.txt | cut -d"=" -f2 | tr -d ']')

  # null resources etc can be filtered out - no AZURE_ID
  if [ -z "$AZURE_ID" ]; then
    continue
  fi

  # print out the current resource and azure id mapping as a comment
  echo "# ${RESOURCE} ${AZURE_ID}"

  # replace the subscription and resource group strings (and remove weird characters from terraform
  NEW_AZURE_ID=$(echo ${AZURE_ID} | sed "s/${OLD_SUBSCRIPTION}/${NEW_SUBSCRIPTION}/" | sed "s/${OLD_RG}/${NEW_RG}/g" | sed "s/\x1b\[[0-9;]*m//g")

  # replace the current terraform state with a "state rm" and then "import" command
  echo "terraform state rm ${RESOURCE}; terraform import ${RESOURCE} ${NEW_AZURE_ID}
  "
# You can update this script name to even be a sh script instead of ps1 
done > terraform-migration-generated-script-TST.ps1