Can a site not be indexed, due to the fact that when entering the site there is an entry restriction by age?

Question

Yandex

In general, there is a site where, when entering the site, a page first appears to restrict entry to the site by age, you probably saw these. For example, I go to some site, a page like this appears, the site is intended only for people over 18+, if you are under 18, leave the site. That's actually the question, can the site not be indexed because of this page? Especially since I can't even create a sitemap. If because of it, then how can you get around it, in the best way, so that search engines can go to the site and index it. Thanks in advance for your replies.

Answer 1

Well, it depends on how exactly you implemented the ban on viewing content on the site

Answer 2

if it's a popup, it will be indexed, if it's a tough page with the inscription "are you a youngster or not", which, when clicked, redirects to another page, then no