Som svar på WPBeginner Support.
Thanks for the reply and clarification about the query.
I think after some time of the full setup to the new domain, isn’t it prudent to completely close the old domain and focus on new domain.
or is it better to let 301 redirect continuously redirects to the posts and page and in the meantime when we fully satisfy that all old domain requests are redirects to new one, only then we take decision to stop old domain.