How to find out the page authority and rank of a blog?

How to find out the page authority and rank of a blog? And what links are pointing to it?

e.g. https://sunshinesmilesdentistry.blogspot.com/

or

https://www.tumblr.com/blog/sunshinesmilesdentistry

Submitted April 12, 2020 at 02:20PM by cloud_roswell https://www.reddit.com/r/Blogging/comments/g080qm/how_to_find_out_the_page_authority_and_rank_of_a/?utm_source=ifttt