Of my knowledge, all family members and friends are vaccinated. Therefore, it's opinion obsolete.
No! Especially since I do not know what that is! : -)
What I know: they are all vaccinated! Just like me ...
Most friends I know that they are vaccinated. Not.
If there was a slightly bigger celebration with us in the circle of friends, we simply always controlled all and mostly all officially tested even if it was not prescribed.
No, I hope to be able to trust my friends!
I do not need anything digital, I speak with my guests.