Trying to understand indexing vs rebuilding cache

[AAColema]

I have an addon that adds some new search constraints. The data gets properly indexed, and after rebuilding cache in ACP I can search using those constraints and it works. However, when a new item is posted, it will not appear in the search using those constraints until I rebuild cache again in the ACP.

Is there a hook or other process I am missing in my code that would properly index the data so that it would be searchable immediately without needing to manually rebuild the cache?
Trying to understand indexing vs rebuilding cache

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