Currently, unsupported PostGIS types are encoded as Point.

See https://github.com/debezium/postgres-decoderbufs/blob/master/src/decoderbufs.c#L528-L529
We should check the result of geography_point_as_decoderbufs_point as we should handle cases whre there is other PostGIS type than Point.

We should have dedicated semantic types for them, similar to io.debezium.data.geometry.Point.