Your tip worked in any case. Get almost the same results as you - have to play with the parameters of ODM to get a better understanding.
Absolutely. The trick with the projects was already known to me. This was our first test with the DJI Pilot app and the mission planning before we only flew manually. With a little practice, Open Drone Map will give us a lot of support in the field.
Unfortunately, I had not found any further information on Multispectral beforehand - it was just a matter of uploading all the images together. I think this thread will help other users as well.