I have used these open source packages pinyin4j JPinyin TinyPinyin, but support for polyphones requires additional polyphone dictionaries.

Is there a more comprehensive polyphone dictionary?

The so-called multi-phonetic word dictionary is a tool that tells the program the pinyin of a certain word in a specific context, such as

Understand=liao,jie
Branch=zhi,hang

Considering the breadth and depth of our Chinese language, how big would a sufficiently "comprehensive" dictionary be? Has anyone in the industry ever created such a dictionary?

How do domestic large companies solve this problem?