I'd love to do the same with mine, but admittedly, the hardware in it is so poor, that they just couldn't get it to work properly.
It's quite frustrating too, because despite being a relatively new router, they're already behind on security updates, and after all the promises, still haven't delivered the bare necessities as WPA3 support
Yeah, no joke, I totally didn't know about any of this, be certain that I'm going to consider this OpenWRT stuff when I'm buying a new router, it one of the most important pieces of my network, and can't leave it to whatever the manufacturer plans to support in terms of security.
Look to the Xiaomi Mi AX6S. Quite capable router and only like $50 on AliExpress. I just got a second one to use as a mesh node and wireless bridge for a bunch of stuff that gets a terrible signal inside of a solid wood entertainment center.