Can Lightning Communities have sub-pages?
Until Winter 21 Release, you could not add the URL level(s) (depth) of custom standard pages. When you try to do that you will get the next error
Include only alphanumeric characters and hyphens
So you can either
- Create different Community Custom Pages with different URLs
- Create different Page Variations and assign them to different Audiences if you want to create alternative versions of the same page.
- Or you can even assign audiences to Community Page Components making it that much easier to get the right content in front of the right members.
It all depends on the appropriateness of using one or another approach in the context of the set requirements.
UPDATE: Winter 21 Release Own page hierarchy for Lightning Communities is available now.
It is now possible to add subpages in Lightning Communities. The feature appeared (silently?) sometime after the Summer '20 release - unexpected (did not notice in the release notes) but very welcome.