I bought Tracks on itch.io and do not see an option to get the new Sci-Fi Pack. I see it on Steam. Is there a way to transfer my license from itch.io to Steam if that's the only way to buy the pack?

I'm afraid itch.io doesn't seem to have a nice way to support DLC of this type, I'm currently looking into how I could handle it..

All Tracks purchases from itch.io include a free Steam key, so you can use that to access the game through Steam and get the DLC if you choose to: here are some instructions.

I was able to follow your instructions and everything works as expected now on Steam. Thanks,  I appreciate the help.

So is the DLC ever coming to itch.io as I never buy from  Steam.