This is my field of work and basically correct. The issue right now is the specific inputs for the process and sourcing them. Flocculant, potash, and catalyst for reactors have all been problematic over the past few years. Potash in particular because Canda and Russia are the biggest producers. If these inputs can be reliably sourced, production and distribution are relatively stable, just more expensive. Most of it is done by rail which is less prone to issue than freight or air.

One thing that does worry me is equipment longevity. Fertilizer production is very caustic and produces a lot of corrosive byproducts like phos-acid, sulphuric acid, etc. This requires constant maintenance using specialized and very difficult to procure parts. There are many critical components with no replacements on hand. Some of these parts are back ordered for a year or more with no alternative supplier(s). Unless we can rebuild or fabricate a solution, any one of these critical components can stop production.