Since nobody replied yet, I have come to the clusion that the tool is not compatible with 9020, chip set issue? Forgotten? It would be awesome if the tool could be updated to support Dell 9020 Non-AIO.

I ended up having to boot a machine with a x64 WINPE SCCM bootdisk for OSD TaskSequences.  Used the F8 feature to get to a command prompt, swapped CD's with my data disk with the Flash64W.exe and o9020A22.exe files on it.

reference: https://miketerrill.net/2017/01/31/first-look-dell-64-bit-flash-bios-utility/

Flash64W.exe /b=o9020a22.exe /s /f /r /p=

This worked.  But this is a walk-around solution, not a fire-it-off-overnight one.

Trying the same command via a SCCM package on the same machine, but with the machine's security, antivirus, host based intrusion countermeasures, etc, it just would not run.  I could not run the o9020a22.exe on WIN10 x64 even logged in as local admin, so evidently my environment is very locked down.

I updated my bios from A21 to A22 on my Dell Optiplex 790

I have windows 11 Build 22593.1    I used WinPass11Auto.exe to get the Dev Updates.

See uploads under TekWiz2021 at archive.org

I tried to run 0790-A22.exe from Win11 but nothing

I tried running from dos Flash64W.exe /b=0790-A22.exe but got message

the loader could not find the bios load.

I had Windows 7 installed on a multiboot partition and ran the file from there

It worked fine...  The file ran and showed me my A21 Bios and showed me the A22 Bio settings

I said ok and it rebooted and installed the A22 Bios no problem. That's the way I did it.