I want to change my WiFi network name
under My WiFi network name says weak security so I want to fix that and also want to change my WiFi network name
iPad Pro, iPadOS 14
The weak security pertains to your WiFi password or the security used. And you need to access your WiFi to change your network name or to configure your password.
It is pretty much complicated to explain here but you can follow the instructions on this howtogeek page: https://www.howtogeek.com/233421/how-to-change-your-wifi-networks-name-and-password/
NOTE: You can commonly find the details for the web access under your WiFi router.
It is commonly labeled like this (or similar):
Network Name (SSID): XXXXXXXXXX
Network Key (Password): XXXXXXXX
If you do not know what you are doing, call for someone's help. I am not very sure if your concern is within Apple's support capabilities. But you can try. Contact Apple for support and service - Apple Support