In solr7.5, How to sort by facet.pivot's the second level field's count?

solr query : http://192.168.106.58:8983/solr/search/select?q=:&rows=0&facet=true&facet.pivot=location.comm,search.resourcetype

I use facet.pivot to query, but I want to sort with count of (search.resourcetype=somevalue)， for example :