Unfortunately we seldom get details about which scenes TG is used in, specifically. There are no doubt even films TG has been used on that we are not even aware of! Because of the way the industry works there is a sad disconnect between the people who own and produce the content (movie studios) and some of the people/companies that actually generate/create that content (VFX houses, etc.). So even if a VFX company might want to mention what software it used, or at least tell the developers, they often can't, at least not without significant "red tape". In communicating privately with VFX studios for things like technical support, they often can't tell us what they're working on either...
That being said, for Star Wars Episode VII and Rogue One Terragen was used mostly for planetary orbit shots. Presumably the same is true for VIII. If we ever get more info we'll happily share, of course!
- Oshyan