We would love to have one more options when adding post to newsletter, that would seems useful for many other users too : have an option to display publish date for the post(s) in the "articles" block options and for the latest posts block.
We were really surprised that was not already an option.
This feature request was discussed in wordpress forum here : https://wordpress.org/support/topic/display-post-date-in-newsletter/#post-15872264