Content outreach and social media is the best way to get rank and traffic as well .
When you submit a site map it indexed all the pages of your website but it will not index the pages which are not allowed to index e.g they are disallow in robot.txt file .
Covid 19 did not hit the ranking directly , but few updates which came from google in these days are effecting the ranking .
My BIO is empty. Try checking my profile later.