Make sure you are connected to a stable Wi-Fi network and have at least 50% battery life before starting the download. The update file size can be substantial (usually around 2GB to 4GB depending on the previous version).
The Y9s, launched in late 2019, arrived running EMUI 9.1 based on Android 9. For mid-range devices of that era, the typical lifecycle includes two major OS updates. The Y9s successfully completed this lifecycle by updating to EMUI 10 (Android 10) and eventually EMUI 12 (Android 10). huawei y9s update emui 13
The Kirin 710F chipset and older internal architecture are often cited as the primary reasons newer, resource-intensive EMUI versions (which include advanced features like "Super Device" and "Service Widgets") are not ported to older Y-series models. Make sure you are connected to a stable