A "patched" Nintendo Switch refers to a hardware revision (primarily those manufactured after July 2018) that has a fixed bootrom vulnerability, making it "unhackable" via standard software-based exploits.
In plain English: YouTube fixed a security flaw in their code, which happened to be the exact same flaw hackers were using to break into the Switch. youtube patched nintendo switch
If you are asking about a "patched" Switch (consoles built after August 2019 like the V2, Lite, or OLED), these cannot be modded via software alone. A "patched" Nintendo Switch refers to a hardware
By following these tips, you can help to keep your Switch console safe and secure. Do not update if using Atmosphere or similar
Verdict:
Great for a parent buying for a kid. Terrible for anyone wanting to explore the Switch’s full potential. Misleading listing if not clearly explained.