All currencies don’t show in the header

Hi,
Hope you are well and safe.

I have inserted the html [woo_multi_currency_plain_vertical] into my header, so that instead of having the currency switcher in the left or right of the screen I can have it neatly in the header.

The only problem is that the list of currencies doesn’t extend beyond the grey of the header like the submenus, etc. So I can only see 2 of the currencies. Is there a way to fix this. I tried chancing the background colour, it didn’t work.

Appreciate your help so much