There is a lot of advice about this topic on the forum, but everything I read didn’t work for me or the screenshots applied to the older version of Webflow.
My navbar is visible on all devices except for mobile. In the designer, you can see the navbar on mobile preview, but on my phone, you can’t.
Could you please update your post with some more information so we can help you faster? Things like your read-only link & screenshots really helps us to help you faster .
It looks like there are additional styles on the navbar element for the mobile-portrait breakpoint which are causing that behavior, but it’s difficult to tell.