I think because their is a huge problem with beta 3 for the note 20 series in Europe. The beta program should be discontinued. We should be able to revert back to stable android 11. I don't think we will see beta 3 for some time as it has serious bugs and can damage your phone.
I'm glad with one ui 4 as well, I'm just saying that it's been over a month now and we don't have the beta 3 yet. If their is a concern about beta 3 and usually we have 4 betas before stable update, I don't think we will have stable release till March or April. The S21 series had stable version within 3 months. The note series will most likely be 6 months. If the developers can sort out the problems.
Beta 3 was released for the snapdragon variant of the note phones. Which are released in the USA and Korea. In Europe we have the exynos versions. Their has been a problem with beta 3 of one ui in Europe 🇪🇺.