Strictly speaking, the Mi 9 SE could have been upgraded to Android 10 from last month. However, the update was a Beta Stable build, so it was not necessarily bug-free. It appears that V11.0.1.0.QFBCNXM did not receive a wider release either, as Xiaomi has replaced it with V11.0.2.0.QFBCNXM.
The new update has been released to the China Stable branch, meaning that Android 10 has finally ended being in beta for the Mi 9 SE. V11.0.2.0.QFBCNXM will only appear as an OTA update for handsets enrolled on the China Stable branch of MIUI, but you can download it from Xiaomi's servers if you want to manually flash it. Please keep in mind that Chinese builds do not come with Google apps or services pre-installed, and flashing the build will factory reset your device.
Corresponding European and Global builds are never that far beyond though, so we doubt that most handsets will have long to wait before they receive Android 10, too. Hence, we expect Android 10 to reach European and Global editions of the Mi 9 SE in the next few weeks or so.