Currently when in a battleground and damaging structures, no damage text is being displayed.
No damage is displayed, neither with bombs nor siege vehicles.
Using default settings fresh addon install.

Hey, try to download this addon https://www.curseforge.com/wow/addons/libsharedmedia-3-0 it helped me.

They have health, without the addon you can see damage text

I think the issue here is that it only displays damage you do, and vehicle damage is not tracked as 'you', in addition to that: do structures even have nameplates?

yes, but without addon it's from blizzard. they don't require nameplates.

Closing this as there wont be support for buildings/anything without a nameplate.