Hi Dee3421,
We see you're running into some issues connecting to Wi-Fi, and you've already done some great troubleshooting.
So we can make sure we understand the issue, what happens exactly when you try connecting? Do you get any errors?
Also, a good way to narrow this down is to test other devices on the same network. Also, test your iPhone on a different Wi-Fi network. What happens when you try that?
The resource If your iPhone or iPad won't connect to a Wi-Fi network has another good suggestion as well:
"Restart
Restart your iOS or iPadOS device.
Restart your router and cable or DSL modem by unplugging the device and then plugging it back in.
After you restart each device, see if you fixed the issue."
Although it sounds like you already restarted the iPhone, restarting the router/model as well could help.
Let us know how it goes. Take care.