Sounds like a cmos battery failure. Which I find happens a lot with Dells. Just buy a new battery and replace it.I have to keep hitting F12 to change the bios settings configuration.
Your screeshots are very helpful.
Based on this screenshot it seems that the disk is visible in BIOS/UEFI:
View attachment 38485
Please select Hard Drive in the image below and take a screenshot with the available options (if any):
View attachment 38484
I don’t know if you can call me, that would be a big help.
HDD symptoms like you're experiencing and date/time is showing wrong information.How do you tell if the CR battery is bad