I’ve done some investigation into NNAPI support on different devices, using the “device discovery” APIs here: Neural Networks API | Android NDK | Android Developers
Interestingly some of the Exynos chips do expose a type 4 device (ANEURALNETWORKS_DEVICE_ACCELERATOR - dedicated accelerator) with the name Eden-Drv.
eg the S21 5G (also seen on A53 5G, different exynos chip)
The Snapdragon-based S22 also has the Qualcomm accelerator available:
However it’s the Exynos S22 that only has the CPU fallback:
So the real question is can we hope an NNAPI accelerator driver for the NPU in the S22 will be added in some future software update?