At home we connect to a TP-Link Archer C7 running OpenWRT. It's only WiFi5, but we have zero issues streaming many 5ghz devices off of it. It's even held up fine while we both work from home.
I also run a second much older TP-Link router using stock firmware on a separate subnet. I don't think OpenWRT supports that one. But only my IoT devices and smart TV connects to it because I don't trust them on my network anyways.
All that being said, I wish there was something better and easier for the tech illiterate. The state of routers/security/privacy sucks today.