Ever since ammonia and the ammonia cleaner have been made seperate things it has become a lot harder get ammonia. Currently you can only find it prodominently in labs and a few other places or make it in a very energy intensive way with multiple generators.
There are however many more and easier ways to craft ammonia. The simplest one is simply to boil ammonia cleaner and disstil the ammonia out of it. Another possibility is to react urea with sodium hydroxide and creat ammonia that way or litterally boil pee or adblue and get ammonia that way.