Engines not visible while migrating engines from one enterprise search server to other enterprise search

Elastic Orchestration Elastic Cloud Enterprise (ECE)
1

Hi,

I am trying to copy/migrate enterprise engines from one server to other server. I have tried below snapshot and restore approach.

With this approach, Indexes are restored in new server and available in response of http://elastic-host1.com:9200/_cat/indices?v API with Open and green status.
But somehow those are not visible in elastic-host1.com:3002/api/as/v1/engines API response.

To transfer existing engines followed below steps:
1 Registered repository on existing enterprise server

curl --location --request PUT 'https://elastic-host1.com:9200/_snapshot/elastic-snapshots' \
	--header 'Content-Type: application/json' \
	--header 'Authorization: Basic <<authentication>>' \
	--data '{
		"type": "fs",
		"settings": {
			"location": "/opt/elasticsearch/snapshot"
		}
	}'

2 Created snapshot

	curl --location --request PUT 'https://elastic-host1.com:9200/_snapshot/elastic-snapshots/engines-backup' \
	--header 'Content-Type: application/json' \
	--header 'Authorization: Basic <<authentication>>' \
	--data '{
		"indices": "*",
		"ignore_unavailable": true,
		"include_global_state": true
	}'

3 copied created indices folder to new server(from elastic-host1 to elastic-host2)
4 created repository

	curl --location --request PUT 'https://elastic-host2.com:9200/_snapshot/elastic-snapshots' \
	--header 'Content-Type: application/json' \
	--header 'Authorization: Basic <<authentication>>' \
	--data '{
		"type": "fs",
		"settings": {
			"location": "/opt/elasticsearch/snapshot"
		}
	}'

5 Restored snapshot

	curl --location 'https://elastic-host2.com:9200/_snapshot/elastic-snapshots/engines-backup/_restore' \
	--header 'Content-Type: application/json' \
	--header 'Authorization: Basic <<authentication>>' \
	--data '{
		"indices": ".ent-search-engine-documents-*",
		"ignore_unavailable": true,
		"include_global_state": true
	}'

Tried by deleting below indexes and restoring them from snapshot, that also did not work
.elastic-connectors-v1, .elastic-connectors-sync-jobs-v1

What am i missing? do i need to modify any config to display those engines in enterprise APIs?