I have created SDF project through VS code, Now I would like to make that project available "public", What is the process? as I am still confuse between SuiteBundler and SDF and SuiteApp

If you're not part of the SDN SuiteCloud Developer Network) I think your options are to 1. Deploy it to an account and then bundle the components and make it available as a public bundle. 2. Post the project on GitHub (or similar) for the world to find. I don't think you can publish as a SuiteApp without going through Netsuite's checks.