Hierarchy of Spatial Anchors

Hi
the documentation mentions that GameObjects should be within 3 meters distance of their spatial anchors. This is especially true for grouped objects (in hierarchy objects).

I have a situation where I have a hierarchy where i place the parent and the children by tapping, and the children are about 2-3 meters away from the parent GameObject.

If I put only one Spatial Anchor on the Parent GameObject I fear for diminished accuracy. Some children are very close to 3 meters away.

Can I put Anchors both on the Parent and the children? Are anchors in a hierarchy allowed?
I am unsure how to proceed.

Thanks
Dimi