Not showing on mobile phone

I have two messages that should show on this cart – a general one and a product specific one that should show when this product is in the cart:
https://thedialhouse.org.uk/product/frozen-meals/

First – does the plugin only show one message at a time? I can see the general message on desktop.

Second – How can it display messages on smaller screen/mobile phone?

Testing by resizing Chrome on desktop Mac Catalina 10.15.7, and also on iphone 7 (latest ios) with Safari and Chrome.

Thanks

The page I need help with: [log in to see the link]