let’s start here: do you have a deploy log we can take a look at?
also: you could try downloading your deploy (if it was successful) and taking a peek at what actually is getting generated (vs what you think is). Here’s a thread on that:
thirdly, here is our general guide for page not found issues, is that helpful at all?
If you are still seeing issues after following the troubleshooting steps in this guide, please let us know!