If employer does not require cover letter for the job application, can we send it?

Basically Employers is not asking to candidate to send cover letter with CV. But if you will send CV along with cover letter, its will get some benefit. and easy for recruiters to find about your experience and skills.

A cover letter is a way to express yourself in your own words and try to find a match between specified job role and your skills.

There must be a cover to see the new employee costs in order to put in place within the annual budget of the company