Why aren't product offers showing up?

Question

1C-Bitrix

Good day everyone!
In the 1s Ut 11.1 database, most of the goods come with characteristics in terms of color, volume, and others. Because the site is still under development, I am doing a manual upload from 1c to Bitrix using bx_1c_import_lite.php files import.xml and offers.xm l.
After that, two information blocks of the catalog and offers are formed in the Bitrix admin panel. I go to the settings of the offer package, the "Properties" tab, and there is not a single field of characteristics that is 1s, although offer packages have been created and attached to the product. Tell me where to look, what needs to be fixed?