Ability to create multiple Page Libraries in a site
Currently, in a modern site, we can only have one Page Library which is the default Site Pages and cannot add more. However, there are situations where having multiple Page Libraries in a site would be beneficial. For example, when there are 2 or more groups of users who want to write and publish News within a site, and they don't want users from outside of their groups to edit those News pages. Creating multiple sites would be an overkill with more operational tasks think of and to take care of, and having folders within a Page Library doesn't quite provide the same feature.
Gaetan Karre commented
Yes same things for me. I'm having several groups of people within the same site with differents permissions and I don't want to have permissions on each pages and manage this by workflows.
This would be extremely beneficial to manage news posts as currently all new news posts create a new page which are mixed in with all the other content pages. This is extremely messy on the back-end