Can't change product quantity on checkout

-- url of the page with the problem -- : ravopleko.platonas.a2hosted.com/cart/checkout
-- HikaShop version -- : 4.4.4
-- Joomla version -- : 3.10.3

Hello,

the field for changing product quantity on checkout is not showing.
I checked another hikashop installation and the code is not the same.

I have made no modifications to the Checkout views.
Maybe is a setting that should be changed?

Please see screenshot.

Thank you in advance,
Yannis

ok, thank you!