The Samsung Galaxy S10 line is already receiving the Android 10-based One UI 2.0 OTA but the update so far is limited to Exynos-powered European models. Samsung's update roadmap says Snapdragon models won't get the update till January but a surprise is on the cards, as certain North American units will get theirs in a few days.
https://www.notebookcheck.net/The-Android-10-update-will-get-to-North-American-Samsung-Galaxy-S10-models-way-earlier-than-expected.447179.0.html