I have a setup of Indexer Cluster (with 2 Indexers and Master node), 2 Search Heads, and 2 Heavy Forwarders.
I have created and replicates the indexes on the Indexer cluster.
But how I can get the same indexes on Heavy Forwarders? Do I need to create the same indexes manually on HFs as well?
I presume you have an app on the Cluster Manager that deploys an indexes.conf file to the indexer (this is Best Practice). To define the same indexes on your HFs, just install that same app on the HFs. Install it on your SHs, too.