Some hackers got their hands on Switch2:
1 - MIG Switch tested and it immediately locks out the Switch 2, turning it into a brick, ends up bootlooping.
2 - Testers that prod the flash storage of the rom chip it immediately locks out the Switch 2, turning it into a brick. Switch 2 detects has some weird protection that it can detect voltage changes that tools cause when scaning the chips, even whn it is minor.
Unless an exploit is found and doesn't result into a brick when implemented it wont happen in a long time, I know 3 testers that were working on hardware and software modding and know what they were doing just find that any work immediately bricks it and Nintendo gave a trouble shooting step to reload the firmware from SD card but it stuck in boot looping.
In the end it had to return to Nintendo and they longer allowed to be testers and had to pay for the console otherwise it will go to small claims court as it has some form of internal reporting that unauthorised use was made.
Apparently a another tester had an early access to a game and it crashed and rebooted but no longer worked until a reihnstall of firmware so it may be a sign that an exploit that triggers a reboot to run unsigned code is out of question as the firmware will refuse to run and needs a clean firmware.
Also FYI reinstalling firmware from SD Card is not offline, it is a generic app that only connects to a Nintendo server to get the latest firmware meaning it doesn't allow to install specific firmware version and no longer can be used as a work around.
Best bet is hope for an emulator and a way to dump Switch 2 roms.