It can be accessed under the Stores menu > Configuration > ElasticSuite entry > Facets Recommender entry

Parameter	Default value	Description
Enabled	Yes	When enabled, facets regularly used by a customer for a given category will be recommended. Elasticsuite tracking must also be enabled.
Max number of facets to recommend	5	Maximum number of facets recommender displayed in layer navigation

If Facets recommender is activated, it will be displayed as follow in front :