TP-Link AC600 Dual Band Wireless Nano USB Adapter (Archer T2U Nano) $19 + Delivery ($0 with Prime/ $39 Spend) @ Amazon AU

Not the cheapest but a decent adapter for reasonable price

High Speed WiFi– Up to 600Mbps speeds with 200Mbps on 2.4GHz and 433 Mbps on 5GHz, upgrades your devices to higher AC WiFi speeds.
Dual Band Wireless – 2.4GHz and 5GHz band for flexible connectivity, upgrades your devices to work with the latest dual-band WiFi router for faster speed and extended range.
Nano design – Small, unobtrusive design allows you to plug it in and forget it is even there
Operating System – Supports Windows 11/10/8.1/8/7/XP, Mac OS 10.15 and earlier
TP-Link - World's No. 1 Provider of WLAN Products within last 11 years. Leading support - Industry leading 3-year warranty and 24/7 technical support