highlighting places (with umaps)

Hello everyone,

I am trying to highlight certain places on openstreetmaps with umaps: https://umap.openstreetmap.fr/en/map/proeftuin-westerpark_183199#17/52.38903/4.87548

However, the map loads very slow (it is not the internet connection - all users have problems with this). Does anyone runs into the same problem or knows how to solve this? Or does anyone know another way to highlight places in openstreetmaps?

Many thanks,

Your maps load very quick in my opinion.
Other way to do this is leaflet or mapbox.