I agree, and I wouldn't mind seeing them post / list / state what standards they meet on their website. There's sometimes a difference between, e.g., using 'food-safe materials' vs. getting the final product 'certified as food-safe' (e.g., independently tested).
Either way, it's probably worth an email / PM to customer service to ask.
Short answer -
The first step is that they hire someone like me to go through all the regs and tell them what they should do. That usually means manufacturing for the most limiting / restrictive set of regulations so that you meet all the others. In this case, since some states require final flower to be packaged as dietary supplements, then it's reasonable to presume that grove bags are (or should be) manufactured to meet packaging requirements for dietary supplements (which, in turn, means food-safe). So, they may meet food-safe requirements even though they don't directly advertise it.
The second step, though, is usually arguing and fighting with me over whether or not they
have to do what I recommended that they
should be doing. That usually involves going to the lawyers out of context, who then come up with a legal justification for them not having to do (i.e., spend money) those things. So, no guarantee. I'm not bitter.
I spent a couple months working just down the street from grove. If you do reach out to them, tell 'em I'm looking for work