Not sure how you would bring saves from a hacked switch to a unhacked switch. I've never done it before, so assume that without hacking both, you'll have to use the Nintendo cloud service to transfer the saves. In doing so, you'll probably get the currently hacked switch banned. But if you managed to get that done, I would assume that the unhacked switch will be ok. Looks like some other people are trying the same thing: https://gbatemp.net/threads/concern...witch-emunand-to-a-v2-unhacked-switch.591588/
Simple: If you used cheats or edited the save file to get stuff you can't get in a normal playthrough. It could be flagged if you ever go online with it, even if the save was transfered to a non hacked Switch.