[makira]

I wonder what will happen to Canadarm 3, as work for it has already started.

https://www.asc-csa.gc.ca/eng/canadarm3/about.asp

[dotnet00]

Commercial Low-Earth Orbit space stations are in the early development stages, the arm could be repurposed for one of those if Gateway gets cancelled.

[rbanffy]

Still useful. Every space station should have at least one.