For input fields which support the query syntax its no problem like
Droplist
Grouped Droplist
DropLink
Grouped Droplink
Checklist
Multilist
Droptree
here I am using the following query
query:./ancestor-or-self::*[@@templatename='Seite']/Global/Faq/*
and here I only need to follow naming conventions in all my tennants and then this should work fine.
but how do you handle
Treelist
TreelistEx
here the query syntax is not working and I don't know how to make the datasource Items Multitennant avaiable
Treelist TreelistEx