There isn't that level of flexibility unfortunately - the map tiles are static images that are pre-rendered, so can't be changed on the fly.
I do not know how the POI's within OSM work, but isn't it possible to show a certain poi-subset from a lower zoom-level, or are the zoom-levels within OSM automatically configured?
If it would be possible to show the OSM POI's, there would be no need for an external dataset.
To be clear ... I know almost nothing about website and OSM programming :-)
Thanks for this suggestion, I can see how this would be helpful. We've updated the Feature Request you referred to so that it now covers a range of POI's. It mainly comes down to whether a global dataset is available for this data and how much this would cost to set up.
In the feature request, there is a request to highlight the café's on the map.
Instead of just highlighting 1 type of POI, it would be usefull to select a POI-type to highlight.
I am importing long cycling routes and would like to split this in multiple day trips.
To do this I try to split this in equal parts based on the available campsites or hotels along the route.
As campsites are only visible at high zoom-levels, it is a lot of work to search them and try to split the route in equal parts.
It would be really usefull to select a certain type of POI to be visible at lower zoom-levels.
Davy Van Peteghem