Stop coding and start selling. If you have something that is up and running, you need to get it in the hands of paying customers. Until you have actual paying customers using your system, you will be guessing about what features to build.

Push the people you have signed agreements with to start using the system. Maybe they don't need the features they asked for. Push them to pay you.

Do not pursue an investor until you have actual clients or money coming in. This is the first thing they will ask about and you will close doors if you approach them too early.