New answers tagged listview
I'd suggest trying to find an UI pattern that fits this purpose - so users are familiar with it, and will find it intuitive to click there to 'expand' and have more content. In your case, perhaps 'card expand' according to Google guidelines (Material Design? is a possibility? Cards: https://material.google.com/components/cards.html Panels: https://material....
I would suggest an icon combined with text. Maybe the word expand or show more etc, something along those lines as there might not be a stand alone icon for exactly what you are needing.
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