how many days or weeks can i leave after, doing a factory reset on nintendo switch before starting a new system

After performing a factory reset on your Nintendo Switch, you can set up the console again at any time you choose. There are no specific time limits or restrictions on how long you can leave the console before starting the setup process. Whether it’s a few days, weeks, or even longer, you can return to the system whenever you're ready. Just keep in mind that you may lose any data that was not backed up if you don't set up the console again.