Insulin is made by bacteria now

Testosterone is synthesized from plants that produce similar compounds that we can convert in a lab to create it. Estrogen is done through similar means as well. But bacteria may be used as well to create enzymes needs to syntheize it or make the entire hormone but every manufactuer has their methods and a lot of if it based on cost of the method and the total yield.

But strong knowledge of chemistry means their are multiple ways to get what you want and nature is wonderful resource for bioprospecting and finding tools you need. Again it all depends on price and some methods are more expensive then others. If you have thr funds to invest for the right machinery and tools you can easily make any method work to mass produce enough to make great profits.