Platform & hardware limitations
Link-Speed not supported
This depends heavily on your hardware, basically the Wi-Fi adapter driver which not always reports the actual throughput (what is necessary for the Link-Speed to work). I got this info from a Microsoft developer in the network team who came across my app and contacted me about this.
My app has nothing to do with this, so there is nothing I can do to fix it... this is hardware or driver related!
For Desktop/Laptops/Tablets, I know of these two (which I bought based on feedback and I can confirm that they work also on my systems but please don’t make me responsible if it doesn’t because there could be a lot of factors involved here):
ASUS USB-N10 Nano (N150) * [I used the driver from the ASUS website]
And make sure you buy buy these exact models, because any other may not work.
* Affiliate-Link: I earn from qualifying purchases at no additional cost to you!
Channel bandwidth not supported
This is a huge limitation, but the Windows 10/11 UWP apps currently can’t detect this because the API's (Application programming Interface) are not present. Microsoft has to implement this in order to make it work…
Band Detection Not supported
It currently is impossible to detect whether a Wi-Fi adapter is capable of a certain band so I could prevent the user of switching to it. For example if your adapter is not capable of 5 GHz (and there are many out there which are not), then I would have preferred to not give the user the choice to switch to a band which is not supported because it will not find any networks anyway.