Japanese carrier DoCoMo has posted a list of phones that will get updated to Android 10. Note that Sonys plans for the global models may be different, but it seems that flagships from early 2018 and later are safe.
Sony Xperia XZ2 Sony Xperia XZ2 Compact Sony Xperia XZ2 Premium
Sony Xperia XZ3 Sony Xperia 1 Sony Xperia 5
Also on the list is the Sony Xperia Ace, a DoCoMo-exclusive phone that is an Xperia XZ4 Compact in all but name. This phone never got a wide release, however.
Anyway, the Xperia XZ1 and XZ1 Compact from late 2017 are not on the list. They originally launched with Android 8.0 Oreo and were updated to 9.0 Pie, but thats where it ends for them.
The Xperia 10 and 10 Plus are missing from the list too, but as far as we can tell, these two are not offered by DoCoM. So the carrier wouldnt list them even if they were getting the update. Still, it would be nice to see an official confirmation from Sony that they will be bumped up to Android 10.
The DoCoMo list contains some Galaxy phones, but Samsung already announced which phones will be updated heres the list. There are beta versions of One UI 2.0 for the Galaxy S10 family if you want to try it out.
Source | Via (in Japanese)