`hey @Mishimeow, don't multipost. If no one replied you yet, just edit the info into your latest post :3.
Now, is your secondary Switch CFW'd? In any case, you can share the profile locally with your main Switch,
then move the save over to your primary Switch, then use Checkpoint to dump the save,
then move the save back to your secondary Switch.
As long as you are offline while dumping via Homebrew, it *probably* is fine, but I don't know what the risks entails, as your primary Switch might have illegal themes, piracy etc etc.