Alter Index so every user can see it

Elastic Stack Elasticsearch
1

I have multiple accounts with different roles and now I created a new index.
Now the roles can't access the new index because it is not listed in their indices configuration.
how can I alter the index so every user can access the index regardless of their configuration?

indices configuration example
  "indices": [
    {
      "names": ["old_index"],
      "privileges": ["read"]
    }
2

You cannot. Elasticsearch uses a role based security model, so all permissions are attached to roles, not indices. There is nothing you can do to an inde, to make it accessible, you need to change the roles.