samsung has released the official schedule for the update which stays relatively same across the globe, and according to it, yes, you'll have to wait till january but s10 smartphones in germany are already recieveing the update, so it also depends on where you live.
According to Android Police, Samsung’s Android 10 roadmap points at January rollout for Galaxy S10 and Note 10, no update for S8 or Note 8 .... patience is a virtue (so they say) and it's already December
