I went over some issues like this and this but I still don't understand if the following scenario is supported:

When working with performance advertisers the conversion funnel is sometimes composed of different stages -
(a) The user reached the landing page
(b) The user is interested in a product
(c) The user purchased the product.
Stage (a) and stage (b) might occur in different domains, and require conversion count separately to show the conversion funnel.
Is it possible to do this in Attribution Reporting?