It seems that tp-link TL-WN725N ver: 3.0 does not work in 6.6 : r/openbsd
TL-WN725N | 150Mbps Wireless N Nano USB Adapter | TP-Link
TP-LINK TL-WN725N 150Mbps wireless N Nano USB adapter - Micro Center
TL-WN725N | 150Mbps Wireless N Nano USB Adapter | TP-Link
Amazon.com: TP-Link TL-WN725N 150 Mb WirelessN Nano USB Adapter 2.4 GHz Black TPLink : Electronics
TP-Link USB WiFi Adapter for PC(TL-WN725N), N150 Wireless Network Adapter for Desktop - Nano Size WiFi Dongle Compatible with Windows 10/7/8/8.1/XP/ Mac OS 10.9-10.15 Linux Kernel 2.6.18-4.4.3 - Newegg.com
TP-Link TL-WN725N USB Wi-Fi Adapter: Only For The Basics
TP-Link USB WiFi Adapter for PC(TL-WN725N), N150 Wireless Network Adapter for Desktop - Nano Size WiFi Dongle Compatible with Windows 10/7/8/8.1/XP/ Mac OS 10.9-10.15 Linux Kernel 2.6.18-4.4.3 - Newegg.com