How to index campaign price in Elastic search

How to include campaign price in the elastic search index? it seems IsCampaignPrice is always false.

Litium version: 7.5.0

This data is built in ProductIndexDocumentBuilder.BuildPriceData and campaign prices are fetched from the CampaignDataHolder that only stores campaigns that set a fixed price.

In general, campaign prices are not indexed. They’re calculated as needed, since some campaigns can have multiple conditions attached to them and be limited to only certain users.