Customizing HTTP route for Functions defined in referenced assemblies

[scale-tone]

For DfMon Isolated I am now looking for a way to customize the route of its HTTP endpoint, when 'injected' into a host Function project. It is important, because otherwise DfMon gets hosted at the root (http://localhost:7071/my-api-prefix) and has great chances to overshadow existing HTTP methods.

In In-Process mode it was possible to achieve by tweaking function.json files at compile time, but now in Isolated mode we don't even have such a thing.

Is there any way to get this working in Isolated mode?
Thanks!