I would suggest a mesh router system rather than a repeater. A lot of Asus's modern routers can be added to their mesh system, Netgear has a good system as well
I really miss Google's original mesh router setup, it was so painless, almost plug and play. But of course, they bought a company and it got absorbed by their nest mesh system, which is more expensive and from what I understand more annoying. And now their old WiFi routers are in support limbo.
But if they can set up a repeater, I feel like they can setup a mesh system. I was able to do it through my Asus app on my phone pretty quickly. The only issue I had was with a used router I got off eBay being finicky about reliably remembering it's mesh setup once it had been unplugged. Something wrong with the cmos or something.