This is interesting since it is already a Snakemake workflow, so the tools would need to be wrapped (probably in a new suite of tools) then they could be used individually or as part of a Galaxy workflow.
For the tool wrapping parts, below is how to get new development projects started:
You could also ask a question at the IUC’s Matrix chat. I cross-posted this over already to get it started, so feel free to join in there or they may reply here. They might also have other suggestions … but some of that might depend on where you are running Galaxy (example: your own server versus a public server). You're invited to talk on Matrix