I haven't tried, but it may be possible to create the visualization cube for your part, and display it in your assembly (by choosing it in the tree) without displaying the part. Or if not, copy it into your assembly.
Edit: I hadn't seen that it was about a necklace, so it's not very suitable!
the answer of @ Tomalam and the other colleagues are relevant to me
2 config
_1 with collars
_2 without collars
Why do collars bother you?
If it's an assembly and depending on the size of it, the necklaces won't be seen, at least in the details, always according to the dimensions and size of your assembly
In the properties of the component in the assembly there is an "Envelope" option, which allows you to exclude the component from the BOM and make it invisible in the drawing... it is also no longer taken into account in mass ownership...
Be careful with the basics, the envelope option is a selection tool.
Fortunately on the latest versions you can disable the option... In the previous versions you had to delete the component and put it back
I would have liked to put another screenshot to illustrate the result... but on lynkoa you can only attach one image per message -_-