I was trying different region by random and discovered that several new features can be unlocked depending on region.
I am from France, if I change the region to Germany for exemple, i Can have several icons set in theme application. While in France it does not exist.
Also, their is a lot, a lot of new themes available with Chinese region, also a lot of always on displays new models.
Specific, if I switch the region to Russia, their is stock price with investing website available on the Huawei Today feature.
If everyone found other things, please share !