You could try resetting the keyboard @Richard09
That and or a soft reboot by turning the phone Off and On.
Here are a few of some similar threads from a forum search that may help. Please note there are more if you want to perform a forum search yourself.
Galaxy-S10-predictive-text-not-working.
Predictive-text-not-showing-after-the-lastest-android-update.
Predictive-text-not-showing-after-latest-Android-Update-Version.
These are some helpful hits from a Google Search too.
I wish you all the best with this situation.
🌈 Stay Safe 🌈
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
