I didn’t know it was possible to make these mediums but there are tutorials on YouTube. I found this one for gloss medium that uses Elmer’s Glue and a water-based Minwax varnish:
I have never tried this but it would be fun to experiment. Here’s one for matte medium that contains glue, glycerin and corn starch:
There’s a link at the bottom of this one that explains the process in more detail. Butter gloss is not something I am familiar with but there is probably information about making something similar out there. Good luck!