To install these binaries:
Copy the contents of share\extension 
lib\ to lib  and bin\ to your PostgreSQL EDB 64-bit same named folders
Make sure your version of PostgreSQL matches the version in the file name of this package
e.g. use pg15 package for PostgreSQL 15


Then in the database of your choice or via pgAdmin GUI install the extensions:


CREATE EXTENSION IF NOT EXISTS h3;
CREATE EXTENSION IF NOT EXISTS h3_postgis;


These were built with mingw64