To check for software updates on your Huawei Y9 Prime 2019, you will need to follow these steps:
1. Go to the "Settings" app on your Huawei Y9 Prime 2019.
2. Scroll down to the "System" section and tap on "Software update."
3. The device will check for any available updates. If there is an update available, you will be prompted to download and install it.
4. If your device is running on the latest software version, you will see a message that says "Your device is up to date."
5. You can also choose to download the update later or download via wifi only if you are low on data.
It's always a good idea to keep your device up to date, as software updates often contain important security fixes and performance enhancements. Keep in mind that updating your device may take some time and may also require a stable internet connection.