Windows x64: 12.2 32-Bit Client Certification
The 12.2 Oracle 32-bit client is certified on any Windows platform where the Oracle Database is also certified.
See this document:
Certification Information for Oracle Database on Microsoft Windows x64 (64-bit) (Doc ID 1307195.1)
Note this passage:
32-bit and 64-bit AMD64/EM64T Information
Any 32-bit Oracle Database Client release with the Server is always certified on the same Windows x64 versions as
the Server is, and on the equivalent 32-bit Windows versions (unless otherwise specified) beginning with the Oracle
10.2 version. Beginning with 12.2, Windows 32-bit clients are only certified with Windows x64
OS. Check the certification matrix for specific 32-bit Oracle Database Client certifications.