Hi Tom,
Thanks for your question. At the moment, the OpenStreetMap module does not support adding fully custom basemaps through the UI. The available map styles are limited to the options provided by default to keep the setup simple and stable for most users.
That said, adding support for custom basemap providers (for example via custom tile URLs) is a valid use case and not impossible from a technical standpoint—it just hasn’t been implemented yet. I will add it to our feature reuest list,so it can be reviewed by the product management team and evaluated based on demand and feasibility.
Thank you for sharing your feedback—we appreciate the suggestion.
Best regards,