After upgrading my iPad 12.9 to 14.4 it had stopped recognizing the Internet. I had read about the use of Private address for your WiFi connections. With the iPad I have several VPNs installed for when I travel outside my home. Turing off the VPN solved this problem. Since the VPN did my see my address it block access to the internet. I tried this on my iPhone 11 and can duplicate this outcome. Hope this helps....

05Feb2021 It has been three days since upgrading to iPad OS 14.4 Essentially the iPad does not recognize the Internet. I am writing this note using the hot spot on my iPhone as a means of getting around this issue. What was working in the previous iOS release needs to be fixed.