Toggle navigation not working on ios, android en windows perfect

I need your help. I've problems with an Navigation button on ios. On Windows in all browsers it's working good but on an ios device the menu isnt opening.

I've tried to run devtools on an ios device to take a look in the console but this stays empty.

https://rb.gy/7o5yql
This is the url of the website.

I've tried to remove the country flag and the logo i thought it was in the way of the button but nothing helps.

Who would like to take a look at it?