Q.dead man’s fingers in the lawn
I just moved and my new home has dead man’s fingers in the lawn, not on any trees that I can see. Should I still be concerned? These are growing semi-rampant in the front yard of my new house. There are no trees in this area of the yard. There is a maple tree at the street, and no mushrooms around or on it. What can/should I do? Thank you!

Yes, you are right to be concerned.
It's likely they are growing over the roots of the Maple.
Consulting a professional Arborist is a good option to determine the exact cause.
If the tree is owned by the city you may want to contact your local County Extension Office.
Here is an article that may provide help.
https://www.gardeningknowhow.com/ornamental/fungus-lichen/dead-mans-finger-fungus.htm
https://www.gardeningknowhow.com/extension-search/