Hi @MS12341
There is no direct action but you can use office script in excel to do that
office script
/**
* This script adds a new row to a table.
*/
function main(workbook: ExcelScript.Workbook, index: number, values: string[]) {
// Get the first table in the workbook.
const table = workbook.getTables()[0];
// Append a new row to the table with the specified values.
table.addRow(index, values);
}
Now in flow use office scipt action to add rows to specific row index

here for demo: i have created array using createArray function , note that in this office script pass the string array only
Hope it helps
Mark it as solution if it resolves your query 🙂