Has the Wifi on your Samsung mobile stopped working after the Android 11 update? Well, I have bad news for you, you will have to delete all the Wi-Fi settings saved on your mobile and configure them from scratch.
Yes, a tedious process if you already have multiple WiFi networks saved, but it seems like the only way to get it working smoothly again. To do this, go to Settings >> Connections >> WiFi. Now open the menu of the three dots and choose Advanced ”>> Manage networks and select all the WiFi to delete them.