Levush - Rav Mordechai Yafe

Shalom!
I saw that the Levush wrote his Sefer in the same time that Shulchon Oruch was printed. Rav Mordechai found them to be missing in several areas, particular in that the did not include the customs which were accepted among the Jews of the Ashkenazic (i.e. Germanic) lands and Eastern Europe. He compiled a work on practical halacha, with the additions of reasons behind various halachic decisions according to reasoning and earlier sources.
This means that he only wrote minhaguei ashkenaz, didn't he?! Why apparently haRav hagaon Hamburger do not mention his sefer in the site and in the books? (This is a curiosity question, chas vesholom not to criticize the wonderful books Rav Hamburger shlita wrote)

Toda!

Meir