ui.modern.max_facet_extra_searches
Background
For some facets an extra search must be run for every category value, this lets you limit those extra searches. This does not include the unscoped or all query which is run because of the facet configuration rather than from the category values typically sourced from the index.
Setting the key
Set this configuration key in the results page (preferred) or search package configuration.
Use the configuration key editor to add or edit the ui.modern.max_facet_extra_searches key, and set the value. This can be set to any valid Integer value.