That is an AUR package. You still need internet connection to compile and install it, but it points to the source of it here GitHub - lwfinger/rtw89: Driver for Realtek 8852AE, an 802.11ax device and you can download it on a USB stick as zip file and then extract it … run the compilation … But you will also need linux headers for the running kernel.
[root tip] [How To] Kernel - Headers - DKMS
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