They mention that they will “make it available” to everyone. What that means is anyone’s guess.

That being said, the way banana plants are propagated and that they’re being sent out to south east Asia means that no copyright will be enforceable.

Maybe not patented, but most commercially grown crops come from proprietary seeds.

Hybrids are made from two plants, and the offspring is not the same. So you need to keep buying new seeds each season. Those two plants that are selected are the secret. Some tomato seeds cost more than 10x their weight in gold.

I watched a good documentary on YouTube about it earlier this year, but I can't find it now :/

Commercial bananas grow from cuttings. I don’t know about the rest of the world, but in the US, plant patents protect against unauthorized propagation.