System Index Access Restriction

Security
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Versions: Opensearch 3.4

Describe the issue: Breaking changes - OpenSearch Documentation Explains the Access to system indexes through the REST API is no longer provided pointing to PR Block access to system indices from REST APIs · Issue #7936 · opensearch-project/OpenSearch · GitHub which is still Open.
Additonally, In this doc System indexes - OpenSearch Documentation it says “ Even with a user account that has read permissions for all indexes, you can’t directly access the data in this system index. “

Can clarity be provided on exactly what operations are now restricted to what user(s) on system Indices ?

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Any Updates ?

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@Chandana_EP As per the GitHub comment, system indices are already protected against API calls via the security plugin.
You can access any of the system indices using the admin certificate defined in the admin_dn in opensearch.yml

Could you tell me what your use case is?