In the Netherlands subsurface data is legally arranged via The Basis Registratie Ondergrond, aka BRO: https://www.broinfo.nl.
TNO manages this data. The data is i) distributed via interactive web portals:
and ii) via EU INSPIRE compliant web services via: https://www.broinspireservices.nl/arcgis/rest/
The OGC WMS feeds can be used to ingest data into professional; GIS packages like QGIS and ArcGIS, or load the WMS in Google Earth.
There are four subsurface models as explained on https://www.dinoloket.nl/en/explanation-subsurface-models. Each has its own WMS servie, which bundle many individual WMS layers:
Two examples of GeoTOP formation "alt_onowa" via WMS in Google Earth: Formatie van Naaldwijk, Laagpakket van Walcheren, gelegen boven Formatie van Naaldwijk, Laagpakket van Zandvoort