How do I switch my PC to Wifi rather than Ethernet?

[Help me windowz]

Hi!I just built my pc. When the Windows 10 booted, I didn’t have wifi. When I click show available networks, I get none. It just says “not connected”. When I open up device manager, all I see is Realtek Gaming 2.5gb Family Controller. No wifi adapter. When I check control panel, and network connections, I only have the option of Ethernet. No wifi. Do I need to install wifi drivers? Thanks for any responses.

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