I use any of a number of USB dongles for my Rpi4-8GB and Argone One V2 case. Most are EDIMax, or RaLink ET series, and work well at the 802.11a,b,g & n levels. I've only found one that runs well at 802.11ac with built in kernel driver, an ASUSTeK USB-AC55 Dual Band AC1300. When in AP mode, everything I have that can connect in AC mode (5GHz) does (laptops, tablets, other Pi4s, etc), and I don't have to worry about adding or modifying drivers to use it.
