Hacking How can i disable select config luma3ds

No (without compiling a custom build without settings), also consider it needs reconfiguring on cfw updates if the settings list changes, and that you can't really brick with them! :)

If she won't use any .bin homebrew either, why not SaltFW, or setting a pin in Luma's config? (can be easily bypassed but only intentionally and with a file manager)
 

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