How to add an arrow to the top menu when 1 sub section or more

[ndu69110]

Hi, I would like to know if in MKDocs with material theme, there is an option (.css, .js file or whatever) to add an arrow to the top menu when there are many subsections (1 or more)?
For instance:
As shown on the attached picture, Documentation and Blog section have an arrow to the right because these sections contain sub-sections.

Thank you!
N.