The release schedule for Oracle 19c was not uniform across all operating systems. The availability of the 32-bit client is strictly platform-dependent.
Oracle Database 19c client is available for Windows 32-bit but is not available for Linux or Unix 32-bit platforms . Organizations running legacy 32-bit applications on non-Windows platforms must implement alternative strategies, such as using the Oracle 18c client or migrating to 64-bit architectures, to maintain compatibility with Oracle 19c databases. oracle 19c 32 bit client