Laravel Nova - how to access component in another card?

I have several cards on one page - but I did not find a way to access a component (specifically it is a DataGrid from Devextreme) in another card using this.$refs etc.

So I guess one must use this.$root etc. - but here I am lost as I don't know the path from $root.

Does anybody know how to access components in other cards on the same page?

Thanks!