Most employees are not paid more in a leap year than in another. For those who work a 35-hour week (or more), the salary is monthly to smooth out the differences in working days each month.
With one more day in the year (366 instead of 365), we are more likely to have additional rest, but this is not necessarily the case. With most public holidays falling on weekdays in 2024, the number of days off may already be lower than in previous years. The only ones who benefit from this February 29 are, obviously, hourly employees.