AWS Amplify: How to redirect multiple domains to different destinations?

In Amplify it's easy to configure a number of domains, get SSL zerts assigned and get the requests in. Instead of letting an application redirect, I want to directly use the redirect feature. So if I can reach the app with https://domain-a.com and https://domain-b.com, configure redirects with
[ { "source": "https://domain-a.com/<*>", "target": "https://domain-d.com/path-x/<*>", "status": "302", "condition": null }, { "source": "https://domain-b.com/<*>", "target": "https://domain-e.com/path-y/<*>", "status": "302", "condition": null } ] and call https://domain-b.com/asdf.html the result will allways be a use of the first redirect setting and ignoring the domain completely. Even without <*> it will behave the same and ignore the domain. Tried a number of combinations, with and without pathes, ...

Any idea? Not useful to do so? The documentation in https://docs.aws.amazon.com/amplify/latest/userguide/redirects.html#simple-redirects-and-rewrites seems to allow domain redirects ...