Woocommerce - product variation selection disappeared, how to withdraw?

Question

WordPress

There was a problem after updating WordPress, rollbacks do not help. There is a sticky cart at the bottom of the screen (appears when scrolling), and there is a product variation selection button. Previously, they were also under the name of the product in the description, they disappeared - I don’t understand why. Here you can see - https://pink-house.ru/product/gel-camouflage-m... . Plugins disabled / enabled / rolled back, nothing helps. I don’t want to completely roll back the site, because order base and so on. Here is an example of a site on the same topic, with the same plugins - https://unipack-kmv.ru/product/banki/