BTP integration OData $filter=substringof

Dear community,

is it possible to use the ODATA filter options as follow $filter=substringof ?

I need to use it for a data variable linked to an ODATA service, added as a BTP integration in the app:

Currently I see only the following filtering options:


I am strugelling with the same and found this: How to add oData $filter in SAP Appgyver No Code / Low Code App - YouTube

I implemented it also using this way. But we needed it in SAP systems due to BTP authentication.
So we implemented “by hand” the authentication with classic REST entities.