Why is the address of the location not specified in the reviews in the personal account?

In the personal account, there are reviews without the address of the location, only the name of the company is indicated. Such reviews are brand reviews, that is, they are left for the company, not for a specific location.

In Yandex.Business, this review is displayed in the Reviews - On the site section.

Yandex offers users to leave reviews about the site (brand reviews) in the Tasks section of the personal account reviews at https://yandex.ru/ugcpub/cabinet. Such surveys are created automatically by Yandex.
You can also leave a review in the address bar of the Yandex Browser.