Hello PTR Testers,
Currently the PTR does not have Demon Invasions active, and Broken Shore and the follow-up quests are disabled as well; this is intended. This content may be enabled at a later time as testing progresses.
The important things that you can help us test out (feedback and bugs) on the PTR realms right now are things like:Transmog Changes and the Appearance TabSpell and Talent ChangesPvP and Honor ChangesOther System Changes like Class Specializations and Glyph SystemEngine Changes (New System Settings and Graphics Options)
Also if you haven't yet, check out the PTR Patch Notes for more info!