Decompilation is rarely 100% perfect. You should expect the following hurdles:
Decompiling a .so file depends heavily on what language it was compiled from: Decompiler Explorer Lib.so Decompiler Online
A free, open-source software reverse engineering suite developed by the NSA. It features a powerful C decompiler. Decompilation is rarely 100% perfect
A project worth mentioning for its historical context is ("Decompilation as a Service"). Initiated by user mborgerson and later forked, mdec was one of the first services to offer this multi-decompiler approach. As its GitHub page states, the project is now deprecated in favor of Decompiler Explorer, but its architecture—where each decompiler runs in its own Docker container behind a web proxy—paved the way for the tools we have today. It also serves as an excellent blueprint for anyone wanting to build their own private decompilation service. A project worth mentioning for its historical context