Lookup table in regular data sources & advanced expressions

Description - Ability to choose an attribute from a lookup table that has a relationship defined with profile attributes within data sources

Why is this feature important to you - This will significantly reduce data storage size as the same information is not repeated in the underlying schema and data records, and enables more personalization flexibility when dealing with custom actions.

How would you like the feature to work - Similar to the May 2024 Release,  allow for lookup tables to be configurable & retrievable in data sources, and can be used in advanced expressions & custom actions.

Current Behaviour - Doesn't allow using lookup features.