I found blue eyed grass in my lawn and saved some from mowing. Also found more in another part of my yard by the woods. I think it's just natural native plant, but I have thrown some wildflower seeds in the past so I'm not 100% sure. Also lots of yarrow growing in the "grass" - saved some of that as well. And goldenrods, fleabane....

And a fuck ton of mouse ear hawkweed which I try to mow or pick before it goes to seed. I need to spray a lot of patches of it. It'll look all brown and gross but eventually grass or less troublesome weeds will fill in.