Small fungi in grass
How do I get rid of these small fungi without destroying grass
These are fungal fruiting bodies/mushrooms growing on what appears to be dying grass. They are a seasonal spore dispersal body and will dry up and disappear in time. Or you can use a lawn mower or broom to knock them down.
If you improve the health and density of the grass with re-seeding, fertilization and water management the fungus will likely be suppressed.