ungerre Said:
"Wifi intermittent connectivity: My iPhone 13 is having intermittent wifi issues. [...]I have tried already to reset and restore network settings and restart the device several times."
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Troubleshooting Intermittent Network Issues:
A. Try Another Network:
What happens when you try another network? Do you still get this issue? If it is a public LAN, then you may be using too much of the resources, and are being kicked off of the LAN. You typically see hotel doing this, especially with little to no vacancy left.
B. Disable a VPN:
If you are connected to a VPN, then disconnect from it. Security Software just gets in the way on an Apple device, and this is a pure example of how and why.
C. Take to the Network Administrator:
If this is not a home network, but rather a large LAN ot business LAN, then contact the Network Administrator. As for a school (i.e. college), the Web Master is the person to contact.
D. Restart your Router:
If this is a home network, then power off your router, and then power it back on.
E. Municipais Issues:
If you live in an urban community, then you maybe having issues through your ISP. There is only so much that broadband can handle.