Playing "all of fabric 5" java 1.18 with version 1.04 of Modern-Industrialization and I can insert iron ingots (from minecraft), there is a recipe for it in the interface and will pull from inventory to fill slot of the bronze compressor, but it will not make the plates.

I'm sorry but I don't understand your problem. Could you explain it more perhaps with more details and some screen of your setup ?

You probably forgot to put steam in the bronze compressor?