E.g. my OnlyTheFacts (tm) news org who doesn’t add any form of opinion to the news they report might still choose to just not report some types of story and choose to always cover a relatively rare type of event skewing the perception of reportable news in the world.
I’m not aware of any news vendors who list the stories they choose not to cover.
I don’t think this is anything new to the 21st or even to the 20th century.
The only thing I am aware of that is even close is Project Censored, which aims to document the most important stories that have been ignored by all major news outlets each year:
https://www.projectcensored.org/category/the-top-25-censored...
Can you point out an opinion expressed by the publication?
As for covered in the news, they do reference the niche sites which cover the stories they’re reporting but i would take it to mean they’ve not been reported in the mainstream news. The two stories i read don't appear in a google news search for example?
The internet has managed to blur the lines and people are convinced anything and everything is automatically news.