Menu button not showing on mobile

Design help General
1

The menu button is visible as I cascade down from desktop to mobile view on designer mode. However, when opening the site on my phone (decimaltt.com), the menu button is not there.

Please have a look:

https://preview.webflow.com/preview/decimaltt?utm_medium=preview_link&utm_source=designer&utm_content=decimaltt&preview=58004ca651fa142b173b620a73c685b4&mode=preview