A couple days after American release of 1.56, SCS pushed the update for ETS2 and as well as in ATS here we have see no significant changes from open beta branch. Base game changes like new Profiles UI or Height Blend effect are the same as in ATS but in European sim some new content revealed for DLCs.

ETS2 1.56
Changelog
Gameplay
- Camera Zoom – Hold/Toggle
Vehicles
- HS-Schoch Tuning Pack DLC Update
- Special Transport DLC Update – CZ LOKO
- Schmitz Cargobull Trailer Pack DLC Update
Visual
- Height Blend
UI
- New Profile Creation and Start-up Flow
- Management UI/UX Improvements
Other
- DLC Browser

As always more details on SCS Software blog.