Monsanto has said publicly that if they lose the Durnell appeal at the Supreme Court they will take Roundup off the market in the USA, leaving generic Chinese suppliers to own the market. Farmers aren't going to stop using glyphosate no matter what social media says.
Trump has been doing a number of actions to keep China from getting their hands in the global trade chaos left by his own administration. Taking Maduro out of Venezuela was another one. IMO that's where this EO came from. Nothing to do with healthy Americans at all.
I feel bad for the Instagram moms that thought they were influencing economic and foreign policy here, but Trump got their vote and that transaction is over.
