Yes, sir. Since the pay cycle is designed for one month, i.e., from the 21st to the 20th of the next month, the remaining 10 days of the month cannot be treated as arrears since they will feature in the next pay cycle. Showing arrears of 10 days on the payslip every month is not logical to the best of my understanding.
Even when we have a pay cycle starting from the 26th of one month to the 25th of the next month, we treat the last 5 days as full attendance for every employee. If any employee is absent during this period, i.e., the last 5 days of the month, it is deducted or calculated as leave for the next pay cycle.