What’s up, Harmeet? I am attaching an article/ link that may help you further diagnose and solve your problem. https://www.samsung.com/au/support/mobil...-devices/cant-connect-to-wifi-network/ If there is a hardware issue, you may need to purchase a new Wifi Antennae for your phone.

What’s up, Bill? Have you tried signing in, via Wifi, to see whether you would be able to recover your data?