I am running openwrt on a raspberry pi 3b+. I am using 2 trendnet usb nics. However, openwrt can only connect to one at a time. I had no issues running dual nic using a snapshot build on a pi 4.
Oh and is there anyway to turn on 2.4ghz without having to install raspbian and setting country code there?
OpenWrt 19.07.4 r11208-ce6496d796 / LuCI openwrt-19.07 branch git-20.247.75781-0d0ab01