JSFiddle - React, Tailwind, and code Playground

JavaScript

var b = {
	"issues": [{
		"fields": {
			"status": {
				"id": "200",
				"name": "Backlog"
			}
		}
	}, {
		"fields": {
			"status": {
				"id": "202",
				"name": "close"
			}
		}
	}, {
		"fields": {
			"status": {
				"id": "201",
				"name": "close"
			}
		}
	}]
};

var data = [];
for(var issue of b.issues){
		var entryFound = false;
		var tempObj = {
    	name: issue.fields.status.name,
      count: 1
    };
    
    for(var item of data){
    	if(item.name === tempObj.name){
      	item.count++;
        entryFound = true;
        break;
      }
    }
    
    if(!entryFound){
    	data.push(tempObj);
    }
}
console.log(data);