Note the following:
Bottom line, I do not see any issues anywhere in what you have reported. None of this has anything to do with the problems that you are seeing.
That still doesn't explain why the Z390 Chipset is barely recognized by Intel on their own site for that matter. And I understand that INF Utility and motherboard specific INF Drivers that you install are just to help Windows 10/other OS's identify the hardware in your system. I'm not sure if it's "perfectly normal" to have chipset devices without drivers either. I had a i5 2500k on a Asus P8Z77-V PRO using Windows 7 back in the day. "No drivers are installed for this device." message on that platform would not turn out good...Like I said in my initial post, the system is running I just wasn't sure if the driver issues had anything to do with games not working properly on my system. That's why I further investigated and posted in here because Intel doesn't really make it easy to contact their support...Regardless I still have an issue with why the Intel Z390 platform isn't supported MORE on their own support site. The very similar Z370 chipset has more support than the more expensive Z390. At least the INF Utility is offered to the Z370 and other chipsets that are older...I just feel like, I'm sure I'm not alone, that even though I've been a long time Intel fan like others out there. Multiple Intel Pentiums, Intel Core i5 2500K, i7 6700K, i7 8700K and i9 9900K are what I owned or still using from Intel...They just stopped caring about us average or enthusiast consumers. I'm sure their server customers are getting support and trips to Belize paid for by Intel LOL. I'm rambling now haha
There have always been cases of devices being resolved without a driver being installed. Intel does not, for example, supply a generic SMBus driver. When Windows 7 was introduced, folks complained about the yellow bang being seen in DM. Intel's solution was to resolve the entry without installing a driver. Applications (like AIDA64, SpeedFan, HWiNFO64, etc.) that need to access the SMBus will load a private driver for the duration of their instantiation. Same goes for the SPI bus. Intel does not want every Tom, **bleep** and Harry browsing this bus, so it too is resolved without installing a driver. Specific apps that need access to this bus will similarly load a private driver for the duration of their instantiation.
Re: "Intel doesn't really make it easy to contact their support" - What baloney! Intel publishes phone numbers for practically every country in the world. They also have had these forums (in one form or another) for a great many years (I have been using it for more ~14 years).
What do you mean by 'supported more'? The documentation for the Z390 is as rich and supported as it is for any other chipset. I will admit that they keep making it harder and harder to find the datasheets - but when you do find your way there (which is as simple as asking), the datasheets for all of the chipsets are there.
Yes, you rambled right down into the absolute drivel there.