We are going to erase the HTML website and replace it with a WordPress website (New redesigned site). We already have 301 redirection( http to https) in .htaccess file. Is this 301 redirection is enough to maintain the SERP ranking/pass the link juice? Or Are we need to add extra page level 301 redirection for all the pages/important pages to its corresponding Wordpress pages.

Eg : /about.html to /about