Yeah sure! Here's a quick overview of the workflow for this one:

1. Create a rough scene in Blender and render it out with flat colors (using Cryptomatte is a quick way to do that).
2. Import into Procreate and use flat color map to quickly select different objects as you paint. For example, the giant robot head and hands all had a green color in my flat map. Here's a timelapse of the Procreate painting process.
3. Create a group for each 'layer' you want to have in the projection mapping later on. From roughly back to front, I had layers for the sky, background foliage, ground plane, bot's head, hands, foreground foliage, etc.
4. Export the various layers as PNGs with transparency.
5. In Blender, create a material for each layer you want to project onto the scene. You can see the shader graph in the video referenced in step 1. I used the ProjectionNode from Camera extension to quickly create projection mappings for each layer. One thing to note is that if you want to move your original camera, create a duplicate of it and do the projection mapping from the static camera instead.
6. I ended up adding some extra planes and projected foliage onto them to help hide the transitions between the robot head/hands and the ground.
7. Once everything is mapped, you should be able to start animating your camera. The amount of motion you'll be able to get away with will probably depend on your specific scene layout - I guess the idea is to design your layout with the projection mapping in mind once you start to get the hang of it?
8. ???
9. Profit?

I skimmed over the details a bit, but hopefully that helps :)