Wpa 3 security
How can I change my wi-fi to wpa3 security
Question marked as
The specific steps vary by router brand/model. If you don't have instructions for yours, do an internet search for your router or if it was supplied by your internet service provider, check their website or customer support.
Many routers that aren't new do not support WPA3. In that case, if you use WPA2 AES you won't get the weak security warning on Apple devices.
Also see: Recommended settings for Wi-Fi routers and access points - Apple Support