IPO? No way. They'd have to publish audited numbers. What's leaked out is bad enough. The real numbers have to be worse. Notice that leveraged loan in 2016.[2] All the details of that have to be disclosed in the prospectus for an IPO.
[1] https://www.crunchbase.com/organization/uber/funding-rounds [2] https://techcrunch.com/2016/07/07/new-reports-confirm-1-15b-...