((J (R) C)),
perhaps you did not understand well what I meant.
You have to connect to the internet with the smartphone for just a moment, just enough time to enable the mobile hospot on the PC, then turn off the power saving option of the mobile hotspot. After enabling the mobile hotspot go to the phone and disable the mobile data. In this way the mobile hotspot on the PC should remain enabled and therefore be able to work in the local area without internet. Have you tried to do this?
It is clear that this is not a solution, but it can be a way or a trick to keep the mobile hotspot running without being connected to the internet.
I understand your exasperation, but the mobile hotspot was designed to share the internet connection and not to perform different functions. To do what you mean you need a "normal" wi-fi router.
However, for this your problem you can send a request to the Feedback Hub.
I understood you, but you don't seem to listen that I cannot usually get an internet connection AT ALL even for "just a moment". I'm not willing to drive a 50 mile round trip every time I want to use MY radio hardware.
And you have no idea what you're talking about. I'm pretty familiar with WiFi equipment, and NO! They are not designed to "share an internet connection." That's either sheer ignorance or some kind of BS cover story. The WiFi chips in these laptops are perfectly capable of operating in hotspot mode without any outside assistance. I have run Linux on one of these machines and it runs a hotspot on the exact same equipment just fine.
Microsoft software is purposefully throwing a monkey wrench into the works, for whatever reason. It's not a technical reason, whatever it is.