The answer is yes. You should always send a cover letter even if it is not required.
A cover letter can stay you away from others who have applied for the same position if it’s well-defined. Like a brand advertisement if a brand is well-defined it will increase its selling prospect. You are going to be in the top 2% of people considered for positions if a cover letter is clearly described.
A cover letter can make a good impression on employer and it is best way to showcase that employer why you are the best candidate for this job.
Your cover letter is a good way to show an employer what you want them to know about you unaccompanied by hiring manager having to figure it out themselves from your resume.