It's not really a big issue but I still think it needs to be pointed out.. On the new S10+ in your settings and 2nd from the bottom is "User Manual" which when you touch/click on it say that it's not available in your language... please see below
Samsung has launched a new device which is not fully supported and as I said at the start it's not a biggie but if its there in the setting menu then it should be supported..
I think that the User Manual issue occurs when you have a Language that isn't supported - For example I have English UK as my primary language & I get the "user manual" not available in your language - Switch to English US & it's there..
Weird... Have you received any OTA since you picked up your S10+? I know that some US variants did - I'm checking with some American friends who have the S10 series if they get the same thing - I'll post back when I hear. I just prefer to hear Google Assistant speak with a UK accent - Sounds like she knows what she's talking about lol