Samsung S21 where is enable auto space after period setting

Samsung keyboard does not have that option to add a space after a full stop. It has an opposite option instead which adds a full stop before two spaces, converting one of the spaces after a word to a full stop.

• Bring up the keyboard,


• tap the keyboard input method chooser in the bottom right,


• select the "cog" and it will bring up the keyboard settings.


• A short way down there is the "More typing options". Tap that.


• in there you will find an option "double tap space bar to add full stop"