Nav Menu button appears on portrait breakpoint in designer but not on actual website

If you go to my site on a mobile phone the menu button does not appear. But if you look at my site using my read-only link, it’s there even on the smallest mobile breakpoint. I’m viewing my website on an iPhone 14 Pro using safari but the menu button doesn’t appear. What’s going wrong?

@Oscar_Garcia I have tested on iPhone - Safari, Firefox, Chrome and Nav X button is visible and works as expected

I’m not sure why it’s not appearing on my phone. I’ve tried Chrome too and it doesn’t appear. I’ll ask my friends to check it on their phones to see if it’s just something with my phone.