This... is called a prototype.
This is a sort of prototype design of a Blaze Cake factory.
In Create, you can create Blaze Cakes - a powerful fuel for Blaze Burners that turn them Super-heated, allowing certain recipes to become available whilst also maxing out their fuel afterwards.
Netherrack goes into this bin, which drops into Grindstones - creating Cinderflour. The Cinderflour sometimes overloads the belt, filling a vacuumulator (Thermal Series).
What's on the left, from there, is the rejected resources - if it doesn't match the filter of "not Cinderflour," it's clearly Cinderflour and goes here.
A mechanical arm picks up Cinderflour stacks left on the depot and moves them when appropriate - onto the same belt used to carry away Cinderflour.
Following that, Sugar and Eggs imported from the Overworld fill a Basin with the specific recipe of Blaze Cake Base. Funnels on the sides import/export, whilst the funnel near the back end (the crate) forces a tube to eject the product into the crate, followed by a funnel forcing one blaze cake base at a time to eject for the filling process.
"Filling by spout" is a required part of the factory, hence the Spout clearly having freshly dumped the Nether's lava lake lava into the Blaze Cake, finishing said cake and dumping it into a bin (Mekanism) which connects to a Quantum Entangoporter (also Mekanism) and thus to the Chocolate Factory (not pictured).
And you wonder where the lava comes from? Here you go. It's literally down there.
Due to how Create's Pully Hose works, if there is a sufficient amount of a liquid, it's counted as Infinite - e.g. Water (ocean) and, obviously, the Nether itself (Lava Lakes).
and that's about it. If you have to ask about the creatures...
Those are Striders in the lava bath (very gentle and quiet beasts) and Hoglins in the pen (so aggressive! so noisy!).
Nether Delights is an add-on to Farmer's Delight. That's all you need to know to understand why they're here. (They're also tasty food! Sadly, no automatic processing. The knife is a must.)