I am having issues connecting my iPhone 13 to any high speed internet/data. The best I can get is 3G which is nothing anymore. I am using Public Beta 17.5.1
iPhone 13 no longer connecting to LTE or 5G
17.5.1 is now released. Did you try installing ?
But your question would better be posted on Apple support community: https://discussions.apple.com/welcome
I forgot to mention that all other devices in the household are on the same networks and working fine.