Querying nested arrays in Sanity schema

{
  type: "document",
  name: "client",
  fields: [
    /*...*/,
    {
      type: "array",
      name: "provider",
      of: [
        {
          type: "object",
          name: "upis",
          fields: [
            /*...*/,
            {
              type: "number",
              name: "carrierId",
              title: "Carrier ID",
            },
          ],
        },
      ],
    },
    {
      type: "array",
      name: "activation",
      of: [
        {
          type: "object",
          name: "upis",
          title: "Ūpis (Cashreg)",
          fields: [
            /*...*/
          ],
        },
        {
          type: "object",
          name: "busmaticScheduler",
          title: "Busmatic Scheduler",
          fields: [
            {
              type: "array",
              name: "plugins",
              title: "Plugins",
              of: [{ type: "string" }],
              options: {
                list: [
                  {
                    title: "Ūpis for City",
                    value: "upis-city",
                  },
                  {
                    title: "Import API",
                    value: "import-api",
                  },
                ],
              },
            },
          ],
        },
      ],
    },
  ],
},

activation[]._type == "busmaticScheduler" && "upis-city" in activation[].plugins

*[
  _type == "client"
  && provider[].carrierId == 5
  && activation[]._type == "busmaticScheduler"
  && "upis-city" in activation[].plugins
]

*[
  _type == "client"
  && provider[].carrierId == 5
  && activation[]._type == "busmaticScheduler"
  && activation["upis-city" in plugins]
]

provider[].carrierId
activation[]._type

5 in activation[]._type &&
"busmaticScheduler" in activation[]._type

*[
  _type == "client"
  && "upis" in provider[]._type
  && 5 in provider[].carrierId
  && "busmaticScheduler" in activation[]._type
  && defined(activation[_type == "busmaticScheduler" && "upis-city" in plugins])
] {
  name,
  sanity
}

*[
  _type == "client"
  && "upis" in provider[]._type
  && $carrierId in provider[].carrierId
  && defined(activation[_type == "busmaticScheduler" && "upis-city" in plugins])
] {
  name,
  sanity
}