Xiaomi has officially launched its Android 17 Developer Preview program today, allowing select devices to participate. The eligible devices include the Xiaomi 17, Xiaomi 17 Ultra, and the 15T Pro, with plans to expand support to additional devices in the future.

This Developer Program provides early access to the forthcoming version of the operating system, enabling developers to test their applications in the new software environment. Notably, this release indicates a change in Xiaomi's naming strategy regarding its HyperOS overlay.
Rather than advancing to HyperOS 4, Xiaomi will release HyperOS 3.3 alongside Android 17, bypassing version 3.2 for unspecified reasons.
The initial Android 17 with HyperOS Developer Preview lays the foundation for a revamped HyperOS design, although further versions will be required to fully understand the forthcoming enhancements.
For additional information and download links for the Android 17 Developer Preview ROMs, please refer to the source link provided below.