I assume that by “working in epic template” you meant that you added a physics handle to it or a constraint?
You need to specify the bone to grip it at because otherwise the plugin doesn’t know, the template by default ignores the bone that is hit assuming that you don’t want to grip there. There is a gameplay tag in the template that can be set on an object “AllowPerBoneGripping” that will pick up the hit bone when using a physx grip type.
https://i.imgur.com/XpCZNkx.png
If you don’t want every bone to be grippable then you will need to change the blueprint logic a bit to return the set one that you DO want.
If you aren’t using the template, passing in the bone name and transform instead of the objects will have the same result.
Edit
You could also skip all of setup if you really wanted to and just constraint a grippable to the bone that you want held and pick that up instead.