Deploy IBM Db2 ODBC driver
CLI was the magic keyword which allowed me to locate:
Obtaining the IBM Data Server Driver for ODBC and CLI software
However, it is not updated as the search criteria ended up as:

Several steps later, you can finally locate the fix pack:

and several steps later download the file:
v11.5.5fp1_ntx64_odbc_cli.zip
The install, however, isn't straight forward, thus requires a guide:
Installing the IBM Data Server Driver for ODBC and CLI software on Windows operating systems
To streamline the process, it seems you have to write your own installer.