Hey! I just bought an Acer Aspire 3 A315-23 yesterday and ran in to this very problem. The problem seems to be with the WD Black NVMe SSD. I can only speak for myself but my computer have the exact same specs as yours, except I only have 256gb of storage. However, I was able to boot my computer with the newest version of Manjaro (kernel 5.8.18-1) but it seemed like it wouldnt find my ssd.
However after I asked google I found the solution:
Edit startup parameters (by pressing ‘e’ at grub menu) to include nvme_core.default_ps_max_latency_us=5500 put this right after quiet
After install and when restarting again edit startup parameters in the same way.
Finally, when fresh install is booted: edit /etc/default/grub in the same way one last time. Finish it of by running sudo update-grub to make the parameter run without having to edit the parameters at every startup.