In PickNik Robotics we use ROS 2 and MoveIt 2 with Gazebo Classic / Ignition Gazebo on mulitple projects in multiple distributions (Foxy, Galactic and Rolling). You may need to get your hands a little dirty with possibly reading bunch of source code (or even editing it depending on your needs), but once you know where to look and comfortable, I think the transition from a working MoveIt + ROS + Gazebo configuration to MoveIt 2 + ROS 2 + Ignition Gazebo / Gazebo Classic should be more or less painless. I strongly think people in ROS 2 community are super helpful, so I am pretty sure if you open issues in the relevant repositories (if you have any problems), or open discussions here in Discourse, you would get help.
For a reference integration of Ignition Gazebo, MoveIt 2 and ROS 2, I gave a small presentation yesterday on Ignition Community Meeting.
Feel free to ping me / open issues / discussion if you need any questions on the migration!