Does Big Sur 11.2.3 fix these issues right now?

There is 11.1 released, hope it fixes this issue

I had similar issues on macOS 11.0.1, but Zoom still works!

Try running Safe Mode on your Mac by holding shift after restarting the Mac, you will temporarily access to the internet. SAFE MODE CONTAINS LAGS

I have this problem too, maybe Screen Time Restricts access to the Internet here it is Check for Any Software Updates & Restart Your Mac. ...  Disconnect All USB Devices from the Mac. ...  Create A New Wi-Fi Configuration in macOS Big Sur. ...  Create A New Network Location With Custom Settings. ...  Reset the NVRAM on your Mac. ...  Reset the SMC of your Mac. ...  Reset the Wi-Fi Router / Modem. Try to connect to a different network.

Hello I have the same problem here and i don’t know if airdrop os going to work without wifi or not?