You might want to add the Insects Forum and tell us where you are located.

tj

in zone 6b, Northern VA

The body shape looks like bee species.

Masked Bee, Hylaeus floridanus? Is it on Garlic Chives?

Yes, on garlic chives. Thank you

That last one looks a lot like Augochlora pura to me. https://www.inaturalist.org/taxa/82523-Augochlora-pura/browse_photos

I was thinking that the first ones looked like little sweat bees of some sort, like Lasioglossum or one of those other ones that start with a D that I can’t remember right now.

Sweat bee mentioned lacks the mask of the bees pictured above (see very top bee of image #1).

They might be wasps or flies. There's a sort of fly here that mimics a bee, and most bees are pretty fuzzy. And I see there's something called a cuckoo wasp that looks very similar to the last photo. Thinking that last one's most likely a sweat bee, tho, thanks to the link posted by macranthos.