This device specs vs price aren’t appropriate in any way. There’s no point paying 100€ for something that only has 2 Ethernet ports, doesn’t have modern WiFi and only 1GB of RAM and an older CPU.
Besides the whole title and movement is a but misleading because the guys from Banana Pi shipped multiple boards already that are built for OpenWrt and have things like WiFi 6 in that price point. One of them is the “Banana Pi BPI-Wifi6 Router” for 60€ and more expensive the Banana Pi R3 that that just makes a lot more sense.