You might find that the Bluetooth parts of the remote have stopped working, because the combined WiFi/Bluetooth card in the TV has failed. Storms and power-cuts and excessive static are notorious for killing sensitive electronic parts inside appliances, because surges can short/open sensitive low voltage logic-gates.
Mine has done that, and the main controls on the remote work via the IR beam, but NOT more complex stuff like microphone/voice controls, or sound and some others.
I am lucky enough to have the "LG TV PLUS" app on my phone, that does all I need via the network. I THINK the WiFi part is still working, but I use a direct LAN comms cable to the TV, so it does NOT need WiFi anyway.
You CAN get that little internal card online (EBAY etc.), it just plugs into the main board via a small cable.