Yes, you found what there is to find. Whether you look in System Settings > About, or through the command line in Terminal with lsb_release -a, the most you will see is the major and minor release numbers. In this case, 5.1.
The final number is used by the elementary team, but it doesn't display within the operating system. So long as you install the ...
After the Elementary System reset the latest batch of system updates were fine. I suspect something to do with the kernel as Raven Ridge (AMD Zen+) processors tend to have kernel issues. I'll be wary of the advanced options to try different kernels if issues persist in the future. Thank you!
Can you do (from a terminal) a 'uname -r' to obtain and show the kernel version that you're currently running?
Also, When GRUB boots, can you start selecting "advanced options" and boot with other Kernel versions to try them out? Maybe the newest kernel is introducing some conflicts on your setup.