Tools like TegraRcmGUI and Lockpick_RCM allow you to "dump" (copy) your console's unique keys and system firmware for use in emulators like Ryujinx or EmuDeck.
Once you have the firmware files on your SD card, the Daybreak homebrew app is the standard tool used to safely install the update. Risks of Third-Party Downloads Download switch bios v16 bin
To get these files legally for personal use in an emulator or for custom firmware (CFW) updates, you must use a modded Switch. Tools like TegraRcmGUI and Lockpick_RCM allow you to