Flex Layout in Menu not working

Hi all!

I recently redesigned the menu on my website.
I am struggling to set the correct layout for my menu links. I was hoping for the flex layout, but it is not working. My goal is to get all menu links displayed without having to scroll (on mobile).
In desktop view I can see all the links for sure, but they are not vertically centered.

Anyone got some ideas on how to achieve this? Many thanks in advance!

Here´s my read only link

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Best regards,