“Is there a way to send multiple payslips and emails with just one click, instead of having to send them one by one? This would be a very useful feature, especially when dealing with a large number of employees (over 200) in the company.”
It’s in ideas but not implemented Batch sending Payslip by Email
Probably best to continue conversations there
If you have over 200 employees, then you would be much better off using a dedicated payroll system and not Manager for processing payslips.
I can’t imagine any circumstances would make using Manager the best choice for managing and administering that number of employees.