GeoServer does not come built-in with support for H2; it must be installed through an extension. Proceed to Installing the H2 extension for installation details.
Installing the H2 extension¶
Ensure to match plugin (example 2.23-SNAPSHOT above) version to the version of the GeoServer instance.
Extract the contents of the archive into the
WEB-INF/libdirectory of the GeoServer installation.
Adding an H2 data store¶
Once the extension is properly installed H2 will be an option in the Vector Data Sources list when creating a new data store.