In the US, the One UI 2.0 beta program will only be available for the unlocked Galaxy Note 10 and Note 10+, it means no beta update if you are on any US network, unlike the Galaxy S10 series.
Additionally, the teaser only showing the non-5G variants of the Note 10 series. In South Korea, Samsung will be starting the beta program for the 5G variant of the Galaxy Note 10 and Note 10+.
In Germany, the One UI 2.0 beta program will be available for the Galaxy Note 10 and Note 10+ smartphones.
You can expect the beta rollout very soon. It should be available to more countries, including India, France, Spain, China, and the UK.