"I am unaware of any COVID related lawsuits outside of those filed against elderly care facilities by grieving families, and those filed by various states' Attorney Generals against businesses that had the audacity to open in defiance of Governors' orders. Can you provide examples?"
I think there is a natural time delay. I think if everything "just opened up fully," the liability issues would be myriad and the number of lawsuits would be higher. I think the lawsuit train is already on the tracks, even if we cannot see the headlight or hear the whistle.
There is clearly some concern, for example related to employment:
https://www.wsj.com/articles/liability-shield-is-next-coronavirus-aid-battle-11588589100
https://www.foley.com/en/insights/publications/2020/06/shield-employers-state-covid-19-indemnity-laws (A lawyer for that firm conducted my college interview by telephone, so many years ago).
https://www.natlawreview.com/article/shield-employers-state-covid-19-indemnity-laws
Restaurants:
https://modernrestaurantmanagement.com/restaurant-owners-could-face-a-host-of-new-liabilities-as-a-result-of-the-covid-19-pandemic/
Again, I think the train is already on the tracks. Opening up completely and fully on a knife switch tomorrow might be seen as a nuclear-powered supercharger or turbocharger for the engine.