Just completed my first Arch install, on an HP EliteDesk 800 G5 mini with a USB wifi/bluetooth adapter..  When running on installation media, the RTL8723BU usb wifi/bluetooth adapter was recognized and easily configured using iwctl, so I didn't expect post-install problems.  Once I completed the install and got to a working KDE desktop, the wifi and bluetooth adapters are not recognized at all; 'ip addr show' displays only loopback and ethernet interfaces, yet lsusb shows the adapter.

It seems logical that I don't have the correct driver installed.  Since wifi worked fine on the install media, it seems that I missed something during the manual installation process.  Haven't found a suitable binary package using pacman.  Still trying to wrap my head around pacman and AUR, but found a dkms driver specific to my adapter model using yay and built/installed it:

It needs to be loaded into the kernel but I haven't discovered how to make that work, and so far I can't find the driver file.

No doubt I'm missing something simple, but a nudge in the right direction would be most welcome.  I'm new to this forum so I'm unsure what expectations are for posting system information, but happy to supply anything needed.