My new cope theory is that Macron is talking about sending troops to increase Ukrainian morale.
The Ukrainian army needs manpower but there's a lot of internal resistance to lowering the age of conscription and Zelensky dares not openly press the issue. Companies don't want to lose their younger workforce and people aren't feeling good about Ukraine's performance on the front right now. They need something to point to so they can make the population more amenable to conscription.
They can't achieve success on the front right now so Macron steps in and offers a (seemingly) strong commitment that they are willing to go all-in. Then the regime in Kiev can push through new waves of conscription. The French announce they are standing back and standing by now that the manpower issue has been resolved.
I don't know, I think the French would, out of all the European states, understand that it is not a good idea to send forces into Ukraine. I feel similar about the idea of France sending troops to how I felt before Russia invaded: I thought they wouldn't do it because it wasn't a smart idea. So I could definitely be wrong.
I am once again and eternally embarrassed to be Dutch. A country filled with naive, pearl-clutching, know-it-all's with a massive superiority complex.