Dropdownmenu not showing entirely on phone

I’m working on a webpage where the dropdownmenu only shows one of it’s three lines. The menu still works, but it’s not very clear that it’s a menu since it only looks like a single line in the right corner. I’m not using a dorpdownmenu on my computer, but one is automatically added to the phone version of the page. I’ve checked two diffrent iPhones to see if they have the same problem with the page, and they do. When i view the phone version of the page through customise on my computer the dropdownmenu looks normal with three lines. I’m wondering if there’s any way to make the menu look normal, or to hide it altogether so I can add a custom dropdownmenu?

Thanks!
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