How to select/comment on a range of lines in github pull request?

Question

There is an option to comment on a range of lines in file on github, see How to refer to a specific line or range of lines in github?

But is there similar option to

Answer 1

Since Oct. 2019, Nat Friedman (CEO of GitHub) declares that feature available
(And, see below, since Feb. 2020, multi-lines comment reference is possible)