Q.I Identified Roots In Flower Beds
Roots not attached to anything stop flowers growing and soil hard

Certified GKH Gardening Expert
Roots can be hard to ID without good photos, or seeing them. Often, you can till the soil to loosen up some of the roots. Otherwise, you might try a raised bed. This will get around the root problem, altogether.
Here are some articles that will help:
https://www.gardeningknowhow.com/ornamental/flowers/fgen/gardening-around-tree-roots.htm
https://www.gardeningknowhow.com/ornamental/flowers/fgen/gardening-around-tree-roots.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/raised-vegetable-gardens.htm