They also say, "Each of our drones can plant over 40,000 seed pods per day“ - so putting these numbers together, does this mean they’ve so far done <2 days of work?

No, it means very few of the seed pods actual become viable trees.

My car can go 120 miles an hour. I've driven 180 miles, how long have I been driving? (You can't know, the rate that my car can drive is independent of how I've used it.)

This drone can plant 40k seeds in a day, that doesn't mean they've used it to plant 40k seeds in a day.

And firing seeds into the ground doesn't solve anything.

It 'solves' getting government grants and possibly VC money on the trope of saving the environment.