Board Game Arena

Some games have a lot of options specific to that game.
- Added Extensions
- Variants
- Easy / Expert setups
- etc.

most of the time I find no place where those are documented and you have to guess from rules, goodies and rare variants what could be what.
For some games you can find it in the wiki:
https://en.doc.boardgamearena.com/Gamehelpsevenwonders

Or am I just looking in the wrong places?

The game option has a little description text under it (on the left when creating a table) that should be in principle enough to make it clear what it's about.