Hello Tony Long.
Since the Windows 11 IoT LTSC interface often hides the touch settings found in the Pro edition, you will need to jump into the registry to disable those suggestions. You need to press Windows + R on your keyboard to open the Run dialog box. Type regedit into that box and hit Enter to launch the Registry Editor and head over to HKEY_CURRENT_USER\Software\Microsoft\TabletTip\1.7 and look for a DWORD named EnableTextPrediction; setting this to 0 will strip the suggestion bar from the touch layout. If you don't see the entry EnableTextPrediction, just right-click to create them as new DWORD (32-bit) values and they will work perfectly. You'll need to restart the TextInputHost.exe process or just do a quick reboot then it will be all fine.
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Best regards,
Scott Nguyen