Hi! The linked Tutorial Shows You Step-by-Step How to Install ASUS USB-AC58 AC1300 Wireless 802.11ac Driver in Kali GNU/Linux Desktop.
And the Kali ASUS USB-AC58 Setup is based on the Realtek rtl8812BU Chipset Driver Installation.
So the linked guide explain How to Download and Install the rtl8812BU Linux Driver.
Finally, in case to check your Adapter Chipset see: How to Check Wireless Device ID on GNU/Linux.
GNU/Linux Kali ASUS USB-AC58 Wireless Driver Installation Guide