How to check if a site has been banned by search engines?

Question

Search Engine Optimization

I registered a domain for e-commerce, everything was fine. Trade was going on, there were clients, traffic was going on, pretty good.
Due to the circumstances, the site has not been working for the last year and a half. More precisely worked but. I tested my CMS every week.
Now I decided to revive the project again. But the position of the site is worrying. Even on low-frequency request, it does not come out.
Before starting the budget for the project, I would like to know the opinions of specialists. Actually the kupident.ru domain itself

Answer 1

Yandex Webmaster? Register a site there; from Yandex there are a lot of useful goodies.