I'm not sure how different the interface is on OneUI, but on my Pixel when I swipe up and hold on an app to open the App Switcher, there is a button below the app that takes a screenshot of just that app.
I don't remember when it was first introduced, but it is a feature of stock Android, so it should be present in some capacity on most Android phones.
I'm not sure how different the interface is on OneUI, but on my Pixel when I swipe up and hold on an app to open the App Switcher, there is a button below the app that takes a screenshot of just that app.
I don't remember when it was first introduced, but it is a feature of stock Android, so it should be present in some capacity on most Android phones.