17-01-2023 07:52 PM in
Samsung Messages app shows upto 10 lines (S22+ here) . If the message is longer than 10 lines, I need to scroll.
If S21 does not support this, then you can type the message in Samsung Notes or a similar app and then paste it in the Mesaages app. Not ideal, though.
You can also send feedback questing this feature via Samsung Members app > Support.