Only shows Mercury Playback Engine Software Only after update

I am running 591.74 (1/5/2025) NVIDIA drivers for GeForce RTX 3080 Ti.  When opening Adobe Media Encoder (Beta) I find that only "Mercury Playback Engine Software Only" is available. Conversely opening Adobe Media Encoder 2025 correctly shows Mercury Playback Engine GPU Acceleration (CUDA) and (OpenCL).  Running the render process in Media Encoder Beta also results in no GPU utilization and render times that are (obviously) 10x slower.