Is the server side code used for grid exports at export.dhtmlx.com/excel available?
I asked that same question a year ago and I was told no (don’t know if that has changed). Because I needed a custom “look” for my data in my Excel documents, and because I wanted an export capability for all of the DHX components (I believe Grid is currently the only component with this functionality), I ended up using PHPSpreadsheet. Now I can export from any of my DHX components in Excel, PDF, and CSV with full customization capability. Have you looked into this?
We may provide a docker image or even the sources of the export service on demand. Please, send a request to the support service.