Nomenclature
I'm sure absolutely no one will confuse 5G and WiFi 6.
Networking overlord Cisco has unveiled Wi-Fi access points and core switches supporting the latest wireless networking standard, the 802.11ax – otherwise known as Wi-Fi 6. Plenty of its competitors have already launched their own takes on the standard, including HPE's Aruba, Huawei, Netgear and TP-Link – even though the …
I think current routers scan the DFS channels between the 2.4 and 5Ghz channels when turned on and if they detect a radar signal in them then won’t rescan them until the router is switched off and on again (apparently due to a lack of a second radio and enough cou processing power).
https://spectrum.ieee.org/telecom/wireless/why-wifi-stinksand-how-to-fix-it
This behaviour will be AP dependent.
The lower end AP's only have client facing rados unless set as monitoring AP's, so exhibit the behaviour you note, although I believe that may also be a requirement in some regulatory zones.
In the enterprise class AP's (i.e. anything using CleanAir - additional radios to scan for interference), they will scan channel availability based on controller settings - either manual/on-demand/scheduled.
Some DFS channels you may want this behaviour, others, like those used for weather radar that scan regularly, you really want to avoid entirely as they will cause client problems.
The Cisco Catalyst (yes, the APs are called "Catalyst") 9115ax and 9117ax are based around "merchant silicone" chips. These APs are "equivalent" to an 1800-series AP and target market is aimed squarely on the "price conscious" buyers.
Please take note the different power draw: 15.4w (eco mode), 30.0w (full power) and 32.0w (USB support).
Sorry... Cisco have reused the model name Catalyst for their WAPs.
I just find this stuff astonishing, like there aren't enough words to use to give a new thing a new name?
I can see it now "Dave bring a Cisco Catalyst in the van with you, we need to increase capacity at site"
"No problems Steve, I've got one to hand, see you in an hour"
...
"Steve you spanner, you've brought a fucking switch/access point [delete as necessary] when I clearly meant you to bring an access point/switch [delete as appropriate]"