I’ve had my TP-Link Omada server go down and I still had WiFi. I would guess that auto AP roaming might not function correctly, but I’m not sure.
I use TP-Link AXE5400 Pros. They’re a pretty great bang for the buck. The only downsides are that they don’t allow for separate 2.4GHz and 5GHz SSIDs, and they aren’t PoE powered.