One of the best ways to stop an app from downloading is to disable background downloads. This will prevent the app from downloading without your permission. You can usually find this setting in the app's settings or the device's settings.
How to stop apps from downloading by themselves on your Android device
Another cool thing you can do is limit your data usage. This will prevent the app from downloading large files without your permission. You can set a data limit on your device, and when you reach that limit, the app will stop downloading.
