Not exactly governments, but I work with NGOs in Germany, and plenty of them use Teams and other MS products, just because they receive them for free and don't have the budget to pay someone to install open source alternatives. Training is especially costly and in these environments people are not really "digital native". It's not even about age, but about culture: people here will do what they are trained to do and fear doing something they don't know, because they might "do something wrong". I was responsible for a platform that gives free online storage, chat functions and videocalls (BBB) for NGOs, and had to hear these arguments over and over when discussing migrations. So unless there is a political drive, together with good trainings and support, the transition is very very difficult.