It's well-known the total environmental impact is much less for plastic than glass. Just the weight alone should allow you to understand this [0] [1] [2].
Glass is not recyclable widely. It is a contaminant in single-stream recycling because broken glass is a hazard for sorting, and even if you are able to recycle it, the transport costs are extremely high [3].
I don't think anyone is completely ignoring it. I think it is an extermely complicated equation. Factoring in PFAS and microplastics gets even more difficult. I don't have research in front of me but it would be interesting to look at regions like Japan that have very tight loops on plastics. How many microplastics get out in the wild. The other problem there is the microplastics from tires, huge issue since those could get in the drinking water eventually. Its a difficult problem.
Glass is not recyclable widely. It is a contaminant in single-stream recycling because broken glass is a hazard for sorting, and even if you are able to recycle it, the transport costs are extremely high [3].
[0] https://www.bbc.com/future/article/20230427-glass-or-plastic... [1] https://ecochain.com/case-studies/case-study-packaging-plast... [2] https://earth.org/glass-bottles-environmental-impact/ [3] https://www.wastedive.com/news/when-its-cheaper-to-trash-gla...