What I am trying to find out is if I can get suno to create only the vocal by taking it out of the music track it creates.

Not sure if you want Suno to isolate the vocal stem which I doubt that it can. Please disregard if you are already aware of the following site.
I loaded your suno recording into here and it isolated the vocal just fine.

For those interested in DAWs, Mixcraft 10.5 now has the onboard ability for stem separation which is very handy. I am curious if any other daws have this function.