if you want to see successful "machine learning based financial statement analysis", check out my paper & thesis. its from 2019 and ranks #1 for the term on google and gs because it is the first paper that applies a range of machine learning methods to all the quantitative data in them instead of just doing nlp on the text. happy to answer questions

paper https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3520684

thesis https://ora.ox.ac.uk/objects/uuid:a0aa6a5a-cfa4-40c0-a34c-08...