AutoHDR without HDR Certificate

[maiden copper]

How is it possible for my Acer Predator XB273K GP, which yes you don't have to mention, I know is barely HDR, running on my RTX 3080, Win11, up to date driver, and triple checked cables/dp slots to fail the HDR Certification, but still do HDR regardless?
Added some screenshots as well.
PSU: Corsair RM750X (connected on a different circuit than the monitor even), Mobo: ASUS Strix X670-E, CPU: AMD Ryzen 9 7950x3d,
I tried DDU/NVIDIA Clean Up/rolling back, still the same result.
It does randomly decide to work though. I'll probably just spend some time backing my data up and then try a clean windows install. I googled a bunch, but nothing really ended working out, I might have missed something tho.
Much appreciated for your input🙏

[sacred parcel]

Use HDR: Supported

This is all it needs

Certification isn't relevant here

Your monitor may not look as well as it does with a certified monitor, though, as their brightness and/or contrast may not meet defined minimums

As an aside; AutoHDR is generally regarded as low quality. Since you have an RTX video card, I suggest to turn AutoHDR off and use RTX HDR instead. (Note: this has some % of FPS impact, and requires the NVIDIA App.)

[maiden copper]

Oh wow. I feel stupid, but also relieved and excited :D

Thank you so much. I never realized RTX HDR was more than that browser thing in the control panel.