That said, the cisco firmware for this specific generation of access points is actually free and trivial to get -- create yourself a cisco account and go to downloads and download the 3802 "mobility express" firmware. The last ME firmware came out in 2024 and all this equipment and software is now totally unsupported by cisco so don't run PCI transactions at home... I'd also avoid running their captive portal or some of their other weird features...
Actually setting it up is a bit of a chore but it is a full featured "enterprise" (cough) AP management system with all the knobs and twiddles you could ask for.
It's really only a good idea if you don't value your time (like me) or if you have a sprawling plaster house where you want to have lots of cheap access points instead of a couple super fast ones.
Lastly, for better or worse, I haven't been able to make my kid's switch 2 work on the network.
Uni has an adapter for USB to Ethernet (if wired is an option) that works with those Nintendo devices, I have one that an extended family member borrowed (unknown if the Switch was a 1 or 2).
But in the one specific case of mobility express, you can ... just download it. Unexpected but actually pretty cool.
You still have to figure out installing and configuring it, which is mildly tedious, and you'll probably need one of those cisco serial cables, but it is an exciting side-quest instead of a dirty forum crawl.
To bring it back to "openwrt" -- this nonsense by cisco, broadcom, HP, IBM, etc is why generation after generation the "enterprise" market is dying -- they're excluding 90% of the would-be engineers from the job market protecting their e-waste from secondary or later reuse, likely just on the off-chance they might make a tiny amount of money downstream. But I guess that's not a line-item that shows up in the quarterly reports (what's the value of "community goodwill" ?)