Speaking of rumored technical specifications, these are the latest leaks I read (alleged Nvidia developer, Linux4Tegra) on the Switch 2 chip.
T239 Drake (custom)
cpu 8x Arm A78C (single cluster)
gpu with 12 SMs, 1536 CUDA cores,
12 RT cores (1x SM), 48 Tensor cores (4x SM),
2.5 tflops (fp32)