distinguish between read/unread post and comments

Hello, don't know if this is a UX bug or a feature request but anyway, here it is, i'll try to describe my use case scenario

A post in a community, especially the pinned one, is something that can last for weeks, months, years.

Maybe a comment, or a question, a leaf can be tied in a very specific thread position, adding specific new found informations in a late addition

Can we have new posts and comments in a clear different colour or in bold maybe ?

The backend seems to know which comments i have not read because it's said in yellow, and link to those posts with new comments appear with a

?scrollToComments=true

but then if i click it, i don't seems to be able to find just the new comments.