A few things I can think of:
Did you get a pre-built? If so, have you checked and made sure all components are properly in? With prebuilts it can sometimes happend that a component comes loose during transportation and even if you built it yourself I personally have had issues where a cable or component wasn't fully in even though I thought I made sure it's fine. Better double check. Game crashes under load can happen for many reasons, including issues with RAM. Could be a power supply issue as well.
What settings are you playing at? While 8GB should be plenty of VRAM for stuff like Metro Exodus it is also possible that you are pushing it beyond that and going over your memory capacity often results in crashes. Have you tried lowering some settings, see if crashes persist?
Have you tried running performance overlays, like Afterburner for example, to see what exactly is happening at the time of crashing or how does your hardware behave in general?
I think the fact that different driver versions all have the same exact problem might indicate that the problem is somewhere else, could be a faulty component. Could be the GPU, could be powersupply or something else. If you got a pre-built then I'd recommend contacting the seller and have them look into it or if you built it yourself, well, the task is up to you I guess.
