Have you ever searched for a signin page for a website on Google. I think the answer is yes. And why do you search for the signin page on Google? Because, you know the exact page you want to open. Now, how do you search for the signin page? Through branded keywords right? So, Indexing signin page on search engine improves your visitors UX, hence it will benefit SEO as well. Make sure to optimize it for branded keywords.

If there isn't any manual action on the domain, there is'nt any issue to work on it. Just keep the keywords intact and with time, it will start getting the traffic as well.

The rich results that was appearing due to FAQ schema is now available for well-known, authoritative government or health websites in all countries.