How to populate Catalog Modeling layer?

In dbt Cloud in Catalog, under Model we see table listing all our models. There is a column named Modeling layer but it is not populated. How can I get this populated? We have Generate docs on run checkmarked for our daily job run for these models which are in a PROD deployment type environment.

Is it in a models.yml file somewhere that we need to define what is Staging, Intermediate, and Marts?

Our folder structure is:
dbt
-models
—dm_core (our mart models)
—sources (our staging models)
—stage (our intermediate models)