I have Dynalink DL-WRX36, running openwrt since day 0. Iirc it was 60 euro year ago. Everything works, wireguard too. No complaints. I believe there is openwrt stable build for it already, though I an still running snapshot as I am too lazy to update.
Thanks. I logged in immediately to update the image, but luckily it was already updated by watchtower yesterday.