Once your manifest is ready, the standard Retailys approach is to register your application at https://core.retailys.com/apps/register?url=your_manifest_url. Typically:
Provide your manifest.xml file (containing <dashboard:section>).
The Retailys system reads it, extracts dashboard:section, and calls the internal process to store routes, canvases, controls, and datasets.
Your application is then visible in the Dashboard’s menu at https://app.retailys.com/.