Additionally, is it possible to apply similar with more than 2 collections? Something like:

{
  "searches": [
    {
      "query_by": "*",
      "collection": "person_primary",
      "filter_by": "id: * || $person_soi(id:*) || $person_addresses(id:*)",
      "include_fields": "person_addresses(*),$person_soi(*)",
      "q": "*",
      "exclude_fields": "vectors",
      "page": 1,
      "per_page": 10
    }
  ]
}