Yes: https://github.com/babashka/babashka/wiki/Self-contained-executable#uberjar

Awesome, thank you. I suppose the way to create several binaries for different architectures is just to run the command on different OS's and publish?

you don't even need to run on different OSs, just download the binaries for different OS

Can you use this with tasks?

yes, read the above link under the heading "Tasks"