In the Xiaomi support community, a moderator has confirmed the development of the MIUI 12 has already started and Xiaomi Mi Play will get the next major update.
However, it is not clear the MIUI 12 will be based on Android 10 or Android 11. You can also check the list of devices that will get the MIUI 12 update here.
According to previous information, the MIUI 12 internal beta update will be released in September and it will be followed by the public beta in October 2020. The stable version should come in December 2020.
Now we have the first batch of MIUI 12 beta:
- Xiaomi Mi 10
- Xiaomi Mi 9
- Xiaomi Mi 9 SE
- Xiaomi Mi 9 Pro
- Xiaomi Mi 8 series
- Xiaomi Mi CC9 Pro/Mi Note 10
- Xiaomi Mi CC9e
- Xiaomi Mi MIX 3
- Xiaomi Mi MIX 2S
- Xiaomi Mi MIX 2
Redmi smartphones:
- Redmi K30
- Redmi K20 Pro
- Redmi K20
- Redmi Note 8 Pro
- Redmi Note 8
- Redmi Note 7 Pro
- Redmi Note 7
- Redmi 8
- Redmi 8A
- Redmi 7
- Redmi 7A
Note: This isn’t the final/official roadmap.