Step suggestions not showing when step file in a nuget library

Using latest Rider for Mac, Specflow for Rider (1.9.4)

We have some basic steps that live in a separate library for the whole company to use.

The [Binding] attribute is on the file. The assembly name is set in specflow.json under stepAssemblies.

Tests run fine and they do find/use those steps in the library.

However, Rider won't show the step suggestions when creating a feature file with them and also shows it as "cannot find a matching step definition"

This doesn't seem to be an issue on Visual Studio for windows however, just Rider (maybe even just Rider for Mac)

I must be missing something in my Rider setup, or perhaps something in specflow.json or how the library is built?

Any help would be greatly appreciated, thanks.