Many technical experts stumble when they are moved into positions of leadership, especially when it comes to managing people. Many have moved into these positions as part of their career progression and not really by choice. Given the option, they may have liked to pursue a more technical career rather than a managerial one. They often lack self-confidence when it comes to managing as distinct from doing things themselves.
In a workshop I facilitated, there was a need to develop the self-confidence of the participants. Self-confidence comes through feeling good about ourselves and our capabilities.
Here is an activity, you might like to try to build self-confidence in your team.
This is best done in small teams. A max. of 5 is perfect.