I mean they kind of say in there. It's an early emergent and it has broad leaves and grows dense mats, which inhibits native species from emerging. The native species are more suited to pollinators and other insects. They're also better at holding the soil together (so removing garlic mustard does in fact improve erosion control)
In my own exploration on my land, I've noticed that dead wood and leaves break down much slower where garlic mustard grows. This could be lack of insects or it could be something allopathic in the soil left by garlic mustard against fungal growth. In any case, the stuff is definitely detrimental to the land around it.
As for edibility the young greens are honestly some of my favorites. They work really well in spicy, meat heavy stir-fries and provide fresh greens at a time when there aren't a lot of fresh veggies about except for tough old kale and grocery store spinach.
In my own exploration on my land, I've noticed that dead wood and leaves break down much slower where garlic mustard grows. This could be lack of insects or it could be something allopathic in the soil left by garlic mustard against fungal growth. In any case, the stuff is definitely detrimental to the land around it.
As for edibility the young greens are honestly some of my favorites. They work really well in spicy, meat heavy stir-fries and provide fresh greens at a time when there aren't a lot of fresh veggies about except for tough old kale and grocery store spinach.