Keeping grass is simpler than that. Just mowing less isn't perhaps simpler by the definition of it but is way better for biodiversity. You could try it in just

Keeping grass is simpler than that. Just mowing less isn't perhaps simpler by the definition of it but is way better for biodiversity. You could try it in just a small piece of your current lawn and see what happens. Mow once near the end of spring and again once 3 to 4 months later. Shouldn't take long before native flowering plants will pop up.