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Android has several ways to manage vibration for individual apps, and the simplest one is through each app's notification settings. Go to Settings → Apps, find the app you need, open its page, and go to the "Notifications" section. You'll find the vibration option there - you can either turn it off completely or choose a specific vibration pattern if that option is available.
If you don't see separate vibration control in the app's settings, try a more detailed path: Settings → Sound and vibration → Notifications → select the app and adjust vibration there. Different Android versions and different manufacturers may have slightly different menu names, but the logic is the same.
Another option is if the app lets you create multiple notification profiles or notification channels (you'll see this in its own settings), you can turn off vibration for a specific channel. For example, in messengers you can often set up vibration separately for messages, calls, and so on. This is more convenient than turning off vibration for the whole app at once.
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