Leave approve or reject

Hello
I am working on leaves i create employee and set the leave approve person for it but when i create leave application the person who should approve or reject only have submit button why?
How i can approve a leave application?
Thanks in Advance…

The leave approver must change the status of the leave to Approved and then you click on Submit

but there is no approve or reject button how i can approve a leave ?

Status is a dropdown on the application form.

Check this link in the documentation for more info

https://docs.erpnext.com/docs/v13/user/manual/en/human-resources/leave-application

Better still, you can set up a workflow for Leave Application. It works best for your use case and addresses your question.