Thanks!
Do those extensions require client support, and if so, is it supported by consumer devices?
Do those extensions require client support, and if so, is it supported by consumer devices?
iOS supports them all: https://support.apple.com/en-us/HT202628
Mac OS doesn't support any of them (much to my chagrin).
On Windows, it has to be implemented by the driver. I suggest using Intel: https://www.intel.com/content/www/us/en/support/articles/000...
With Android, it's hit or miss. All modern flagships support them AFAIK. Going back in time, it's limited to premium vendors. I'd expect the majority of devices to support 802.11k, although they're quiet about it. You'd have to check logs on your AP (if available) to determine if it's in use.