While every other source including the Nvidia employee is pointing at Nvidia T239 but you like to argue and change course to fit your constantly changing narrative. https://www.notebookcheck.net/NVIDIA-Tegra-T239-New-leak-offers-clues-about-rumours-next-generation-Nintendo-Switch-chipset.654330.0.html
Not to mention Nintendo would kill the Switch 2 if they don't use Nvidia by keeping Switch 2 BC, which doesn't work in this day and age. Nintendo always keeps handhelds and since 2006 their consoles at least 1 generation BC.