JSFiddle - React, Tailwind, and code Playground

JavaScript

let main_object = [
       {
          "apple":[
             {
                "name":"aaaa",
                "count":"1",
                "filter":{
                   "type":{
                      "name":"test3"
                   }
                }
             },
             {
                "name":"bbbb",
                "count":"9",
                "filter":{
                   "type":{
                      "name":"test2"
                   }
                }
             }
          ]
       },
       {
          "orange":[
             {
                "name":"cccc",
                "count":"6",
                "filter":{
                   "type":{
                      "name":"test"
                   }
                }
             }
          ]
       }
    ]
    
    
    
    let updated_data = {
	   "orange":[
	      {
	         "name":"cccc",
	         "count":"1234",
	         "type":{
	            "name":"updated_name"
	         }
	      }
	   ]
	}

let rtype = 'orange';

const altered = 
  main_object.map((level1,i) => {

  if(level1[rtype] !== undefined){
     const data = level1[rtype].map((item,index) => {
     if(item.name === updated_data[rtype][0].name) {
       item = updated_data[rtype];
     }
     return item;
  })
      if(level1[rtype] !== undefined){
      level1[rtype] = data;
    }
  }
    return level1; 
  })

console.log(altered);