You should be able to use physics:=dart with ros2 launch gazebo_ros gzserver.launch.py to specify a different dart as a physics engine, but that doesn't seem to be working. I think I broke it in https://github.com/ros-simulation/gazebo_ros_pkgs/pull/1456
You should be able to use
physics:=dart
withros2 launch gazebo_ros gzserver.launch.py
to specify a different dart as a physics engine, but that doesn't seem to be working. I think I broke it in https://github.com/ros-simulation/gazebo_ros_pkgs/pull/1456