simple vocabulary arrangement

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p {background-color:rgba(10, 10, 10, .1);}
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<div id="div1"><p id="p1">
After a weeks-long confrontation, South Korea’s impeached president Yoon is detained
2 hours ago

Politics
Hegseth's comments on military law questioned in confirmation hearing

Politics
Former first lady to skip Trump inauguration

Lifestyle
Kate Middleton shares health update nearly 1 year after announcing cancer diagnosis

U.S.
LA mayor issues housing executive order amid wildfires, crisis

Lifestyle
Starbucks reversing open-door policy to 'prioritize' paying customers

U.S.
Monthly border encounters decrease to lowest daily average since July 2020

International
Middle East live updates: Israel, Hamas closer to ceasefire than ever before

</p>
<p id="p2"></p>
<p id="p3"></p>

</div>

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const obj={};
var arr=p1.textContent.split(/\s+/).map(i => i.toUpperCase()).sort();//regular expression
console.log(arr);
arr.forEach((item,i) => {

if(!Object.keys(obj).includes(item[0])){
obj[item[0]]=[];

}else{if(!obj[item[0]].includes(item)) obj[item[0]].push(item);}//remove duplicates;
});

//
for (const i in obj){
if(!obj.hasOwnProperty(i)) continue;
console.log(obj[i]);
p2.innerHTML +='<br>'+i+'('+obj[i].length+')'+"<br>"+obj[i].join(' ')+'<br>';
}

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After a weeks-long confrontation, South Korea’s impeached president Yoon is detained 2 hours ago Politics Hegseth's comments on military law questioned in confirmation hearing Politics Former first lady to skip Trump inauguration Lifestyle Kate Middleton shares health update nearly 1 year after announcing cancer diagnosis U.S. LA mayor issues housing executive order amid wildfires, crisis Lifestyle Starbucks reversing open-door policy to 'prioritize' paying customers U.S. Monthly border encounters decrease to lowest daily average since July 2020 International Middle East live updates: Israel, Hamas closer to ceasefire than ever before