The only reasonable study linking glyphosate to bee harm was designed to mimic large-scale farming application. They used huge concentrations and only found disorientation of bees, but not a reduction in bee population.

Glyphosate is not a neonicotinoid, which is class of chemicals you are probably referring to.

There are a number of agricultural chemicals that we see as being anecdotally harmful.

Heres a meta study concluding that glycophosphate exposure can contribute to population reduction. https://pubmed.ncbi.nlm.nih.gov/33636765/