Azure IoT Edge's set of Tier 1 operating systems has been expanded to include Red Hat Enterprise Linux 9 on AMD64. Official installation packages targeting AMD64 for the latest IoT Edge releases (1.4.10) are now available from Microsoft's package repository.
For more details see documentation on Platform support and how to Create an IoT Edge device.
Note: On RHEL 9, the IoT Edge security subsystem has been tested with openssl 3.0. It may not function properly if older versions of openssl are also present on the device. If you previously installed openssl 1.1 in combination with an earlier version of IoT Edge then we would recommend removing both and starting fresh to avoid potential incompatibilities.