How to Enable WiFi in Windows Server 2019

The Wireless LAN service is a feature in Windows Server® 201x that you can use to enable the wireless WLAN AutoConfig service and to configure the WLAN AutoConfig service for automatic startup. Once enabled, the WLAN AutoConfig service dynamically selects which wireless network the computer automatically connects to, and configures the necessary settings on the wireless network adapter. This includes automatically selecting and connecting to a more preferred wireless network when one becomes available.

How to enable Wireless in Windows Server? Article
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To enable the Wireless LAN Service using GUI.
In Server Manager Dashboard, click Manage, and then click Add Roles and Features. The Add Roles and Features Wizard open.

Click Next. In Select installation type, select Role-based or feature-based installation, and then click Next.

In Select destination server, enable Select a server from the server pool, and in Server Pool, select the server for which you want to enable the Wireless LAN Service, and then click Next.

In Select server roles, click Next.

In Select Server features, in Features, select Wireless LAN Service, and then click Next.