I think they will have a hard time reinstating any kind of physical ministry. The majority hated door to door but would never admit it. Privacy laws made keeping written records illegal. Field service was really about the social aspect of it. Before the rona hit going door to door had become a joke. Driving around a lot and really doing about 15 minutes of preaching and counting 2 hours. Not very effective at recruiting new members.
As far as the cart witnessing, if there is even a remote chance of getting covid no one wants the risk. The longer the witnesses suspend public witnessing the harder it will be to get going. We’re a year and a half in and I see it being at least another year before people feel safe. Many are so frightened they will probably never feel safe with strangers