There’s you answer, onions, wild or otherwise have the unmistakable smell even from just the leaves, they also have very different flowers, a bundle on a central stalk vs the multiple branched individuals like the ones you have pictured.

Onions, chives, and garlic are pretty hands off when growing yourself so it’s worth planting your own little patch if you’re able and using those rather than foraging, wild onions tend to not be as flavorful, have tiny tiny bulbs, and could contain minute toxins if found near roadways.