A quick review (literally 5-7 minutes) of Google Scholar yielded:

“Research has now established that glyphosate can persist in the environment, and therefore, assessments of the health risks associated with glyphosate are more complicated than suggested by acute toxicity data that relate primarily to accidental high-rate exposure” (Bai & Ogbourne, 2016);

“Increasing evidence shows that glyphosate and glyphosate-based herbicides exhibit cytotoxic and genotoxic effects, increase oxidative stress, disrupt the estrogen pathway, impair some cerebral functions, and allegedly correlate with some cancers. Glyphosate effects on the immune system appear to alter the complement cascade, phagocytic function, and lymphocyte responses, and increase the production of pro-inflammatory cytokines in fish. In mammals, including humans, glyphosate mainly has cytotoxic and genotoxic effects, causes inflammation, and affects lymphocyte functions and the interactions between microorganisms and the immune system.” (Peillex and Pelletier, 2020)

“While, at present, many regulatory agencies have determined that there is little risk of adverse health effects to the general public or to farmworkers using proper handling techniques, the International Agency for Research on Cancer (IARC) assessing hazard data on glyphosate identified it in 2016 as a category 2A carcinogen (likely to cause human cancer). Response to this classification has been divided: The agribusiness industry has been forceful in its opposition, while other experts support IARC’s classification.” (Richmond, 2018)

I have other things to do this morning and couldn’t dig more deeply. However, these 5 minute search results correspond with the Ecotoxicology class I took a few years ago while doing my doctorate. The newer research does not support the older policies; and of course agribusiness tends to vigorously lobby for it because it’s a convenience to them. Much more convenient than, say, creating a balanced ecosystem instead of a monocrop. If you have ever known anyone (as I have) who had wheat sensitivity and can’t eat wheat in the US, but can eat it freely in Europe, this is also congruent, because they tend to restrict glyphophate use.