Yesterday Samsung announced the expansion of the One UI 3.0 beta program for eight devices, which also include the Galaxy Note10 and Galaxy Note10+. Well, the beta program for the Note10 duo is now live in South Korea, and the Plus model is already receiving the One UI 3.0 beta update in Samsung’s home country.
If you live in South Korea, you can give One UI 3.0 beta a try by participating in the beta program through the Samsung Members app.
The rest of the devices that are confirmed to get One UI 3.0 beta are the Galaxy Z Flip 5G, Galaxy Z Fold2 5G, Galaxy S10, Galaxy S10 5G, Galaxy S10e, and Galaxy S10+. The South Korean units will get the beta update first, but you can expect it to arrive in other countries soon.
Source 1 (in Korean) | Source 2