Some Minilab kits use the same mixture like amateur kits (Tetenal).
Others require a strange mixture for small volume, like FujiHunt, because the bottles are matching a full tank volume.
But you find the mixture ratio in the manuals.
You normally need a starter solution for Minilab chemistry. This slows down (or ages) the developer when using fresh solution. You can also work without starter but then you should do some tests and ahort development time a bit. Otherwise you could end up in higher contrast or higher density.