I could be misunderstanding, but if subsequent requests are to be made with the DNS provided by DHCP, reachability to 8.8.8.8 would only be helpful to disambgiu

I could be misunderstanding, but if subsequent requests are to be made with the DNS provided by DHCP, reachability to 8.8.8.8 would only be helpful to disambgiuate what kind of network error is causing a failure to make network calls regularly. Otherwise, reachability would be best tested with, for example, a Google domain using the provided DNS.