[
"Fri Feb 23 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 24 2022 12:00:00 GMT+0800 (Philippine Standard Time)",
"Fri Feb 25 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 26 2022 12:00:00 GMT+0800 (Philippine Standard Time)"
]
const arr = [
"Fri Feb 23 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 24 2022 12:00:00 GMT+0800 (Philippine Standard Time)",
"Fri Feb 25 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 26 2022 12:00:00 GMT+0800 (Philippine Standard Time)"
];
const result = arr.flatMap(item => item.split(','));
console.log(result);
You can flat all and add to new array.
Example below:
var data = [
"Fri Feb 23 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 24 2022 12:00:00 GMT+0800 (Philippine Standard Time)",
"Fri Feb 25 2022 12:00:00 GMT+0800 (Philippine Standard Time), Fri Feb 26 2022 12:00:00 GMT+0800 (Philippine Standard Time)"
];
var dataSplited = data.flatMap((value) => value.split(", "));
console.log(dataSplited);