https://arstechnica.com/gadgets/2019/12/samsung-ships-android-10-in-the-us-s10-users-on-t-mobile-sprint-get-update/

After shipping the big Android 10 update for international versions of the Galaxy S10 earlier this month, Samsung and carriers are now starting to roll out Android 10 for the US and Canadian users. SamMobile reports US carriers T-Mobile and Sprint have started shipping the update, and there are reports of unlocked Galaxy S10s getting the update, too.