Wow! I never knew things like this existed! I always used wget (full below) but nowadays seemingly all sites are behind cloudflare so I need to pass a cookie too.

Glad to see easier methods!

  wget \
     --header "Cookie: <cf or other>"
     --user-agent="<UA>"
     --recursive \
     --level 5 \
     --no-clobber \
     --page-requisites \
     --adjust-extension \
     --span-hosts \
     --convert-links \
     --domains <example.com> \
     --no-parent \
         <example.com\sub>