Hi @georgiosd(georgiosd), schemaSubPathMatches expects a second parameter with a predicate. The idea is to conveniently check a nested property of the the element which is to be matched.
If I understand your use case correctly to match on all properties nested in productOnTenant, then you can simply write your own tester, e.g.
In the end each Tester just takes uischema and schema as parameters and returns a boolean. So you can check whatever you like. Would this also cover your dynamic use case?
I see you already opened the rerender issue. Just note that we have a “known” performance problem when doing many edits (e.g. typing fast in a text control) in large forms as the whole data object is validated and a rerender triggered (which mostly should result in memoized cache returns) on every keystroke. For these cases we would like to implement a debounce mechanism, so the whole cycle is not executed so often. See this question for more information.