Me and few of my friends have this issue. Keyboard predictive word feature isn't working after the latest Android update (about a few days ago...). I am using this feature very often and really on it a lot. I have found some solutions like checking for updates of both keyboard and languages as well as resetting the keyboard to default, I have done it all and it still isn't working. It is definitely due to update so please try to fix this problem.
Solved! Go to Solution.
When you launch the keyboard and press the settings cog and tap on smart writing is predictive text toggled On @KrisS10
I'm on Android 10 with Samsung One Ui 2.1 and predictive text is working.
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Current Phone ~
Samsung Note 20 Ultra 5G SM-N9860_256Gb SnapDragon 865+
Samsung One Ui 3.1/ Android 11.
Try this- settings-general management-language&input-onscreen keyboard-manage keyboards-click all off- go back -press on Samsung keyboard-smart typing and you should be able to turn it back on. I hope this works for you x