Bitrix after the exchange with 1s how to fill in the properties of the product?

Question

1C-Bitrix

Good day, please advise.
We uploaded the product catalog to the site, from 1s to Bitrix.
The properties of the goods were unloaded, their values ​​too (to the info block on the site).
But all these properties are not set for the goods in the catalog. How to make it so that they are filled in and immediately displayed on the site?