Woocommerce product page display problem on mobile

Hello,
I have a problem with my woocommerce product page on mobile. It seems that the date selector and the ADD TO CART button do not show on some mobile devices (not all of them). Do you have any idea of what file/element could cause this and how I could solve this? This is quite critical for me to ensure that all mobile views can see the full page and book.
You may try it with this test page :

Thanks very much.

Hello Nicolas,

I have tried this URL on multiple iPhones and also Samsung Galaxy, including iPhone 6, 8 plus and Galaxy J7, both OSX and Android devices are showing the “Add to Cart” button, as shown in the screenshot which is from real iPhone 6+

Can you please try our demo url https://themes.waituk.com/entrada-default/product/boating-and-sailing-tour/ and let me know if you face this issue there as well, or if its only on your install, and also, please provide the make/model of the mobile device, since we do not have this issue reported by any other user, will be happy to test this further for you.


Thank you