Which are the typical production steps (mixing, distilling,
extraction.. etc) in flavors and fragrance manufacturing techniques
such as expression, steam distillation and extraction? Or what are
typical production steps for essential oils, absolutes and aroma
chemicals and how can thay be described in a general flow chart from
raw materials to final product?

You can start out with this book as a general reference text for
extraction methods and synthesis/production steps of fragances.

"The chemistry of fragrances" compiled by David H. Pybus & Charles S.
Sell, Royal Society Chemistry. ISBN. 0-85404-528-7

General flowcharts are going to be difficult to find, since each
fragrance has to be purified by its own specific procedure.