My Original comment is #13 above.  Since that comment I followed the advice of 
the comment #11 above which said "I also observed that removing `quiet splash` 
and adding `debug ignore_loglevel` to the kernel command line..."
So I did a
sudo xed /etc/default/grub
Found the  GRUB_CMDLINE_LINUX_DEFAULT= line and removed the 'quiet splash' and 
added the 'debug ignore_loglevel`
Then I did a
sudo update-grub
and rebooted.
I am still running kernel 7.0.0-28 and I have let the computer go through heavy 
usage, several sleep cycles, let run over night, etc. and so far it has 
rebooted successfully several times.
So, for me, this seems to have done the trick.  If it fails again in the future 
I will repost a comment to let you know.

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https://bugs.launchpad.net/bugs/2161289

Title:
  Kernel 7.0.0-28-generic: system hangs on shutdown/reboot on ThinkPad
  T14 Gen 2 AMD

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