Actually, it's OFW on another system entirelyClarifying that you mean running CFW on Emunand and OFW on Sysnand (which is typically the case) you can migrate game saves from Emunand to Sysnand using NXNandManager and JKSV but there are risks. Here’s a recent discussion on the topic around the risk of getting banned. There are differing opinions so know this going in.
I have CFW on my original model's Emunand, and an unmodified OLED system
I know injecting saves onto other save files causes telemetry issues, but am I able to just transfer my full user data over with the official transfer method without catching a ban? It won't bring along any homebrew software afaik