One UI's screenshot gesture ( palm swipe ) is quite ridiculous ☹️. Many other brands use three-finger gestures for screenshot taking and smart select like features and those are quite convenient. Samsung should implement 2 or 4 finger swipe gesture in this regard if they can't have such 3-finger one due to patent issues.
Use the assistant menu (as a floating icon) for that. This is a built-in feature.
Search 'Assistant menu' in Settings and turn it on, now go to inside it... Now press 'Select Assistant menu items' and add 'screenshot'. Done... (Now Assistant menu showing as floating button)
Now, when you want to take a screenshot, then you can do it by this Assistant menu (as a floating icon). Press it and choose a screenshot.
This feature is better than swiping finger gestures. I have been using this feature for a long time
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