With regard to the WTO, there's no dispute resolution process anymore. As you said, the U.S. has pulled away from that, so it's not really functioning. With the EU making its choices, particularly on something like this deforestation element that it's going to bring, as well as its approach to crop protection products, the WTO is a channel to dispute that, and I would suspect that there will be efforts to do that.
However, the reality is that the dispute resolution process is broken. You can put it to the WTO and raise it at the agricultural committee, but the WTO's ability to resolve it is just not there.