Q.Service berry tree
Bark on one side of the tree is peeling. Some branches have died & there are
some leaves turning yellow. We’ve heard this may be a type of fungus that affects hardwood trees & the tree should be removed immediately.
Is a service berry a hardwood tree? Are there steps to take to save the tree?
Thank you for your assistance.

This could be Fire Blight, common on Serviceberry.
Here are some links with more information.
https://www.gardeningknowhow.com/edible/fruits/serviceberries/growing-serviceberries.htm
http://www.clemson.edu/extension/hgic/plants/landscape/trees/hgic1026.html
https://www.gardeningknowhow.com/plant-problems/disease/fire-blight-remedies-and-symptoms.htm