If you are in Australia, and not a single one of these is available anywhere, here is an alternative -> https://www.amazon.com.au/Ziyituod-Frequency-Extension-Compatible-ZYT-6dBi/dp/B08GJXZ1T2/ref=sr_1_9?dchild=1&keywords=External+Wifi+Antenna&qid=1614300641&sr=8-9
> B550-E
OK, that uses an Intel AX200 chipset (802.11ax / WiFi 6). That means that any reasonably modern set of WiFi antennae spec'd for 2.4 + 5.8GHz signals ought to do the trick. I've linked an example of such a pair for reference.