the new iphone 13 pro will not connect to wifi. it shows the symbol in the upper right corner like it is connected by nothing will load.

See this Apple article: If your iPhone, iPad, or iPod touch won’t connect to a Wi-Fi network

https://support.apple.com/en-us/HT204051

the symbol shows up in the upper rt corner by nothing loads.

What kind of symbol is that?

See this Apple article: Status icons and symbols on your iPhone

https://support.apple.com/en-gb/HT207354 

If you have a VPN app on your phone, delete it. Don’t just turn it off, delete it.

Restart your router.

Test with other networks, like Starbucks or MacDonalds.

If none of these solve the problem post back; there are other things to try, but these are the most common.