The Note10 beta program was delayed like crazy. It has just released in India, it has not come out for the US yet. We should be expecting it within a week or two. The stable beta will come out later this November, so that is when the beta program will become more widespread.
My wife has an S10+. When she recieved the One UI 2.0, it was laggy, but the One UI 3.0 fixed the lag and now it's buttery smooth. Can't wait for my Note 10+ to recieve the update 🤤