Using KDEConnect on Kindle Fire HD 10 linked to Android Phone

I am trying to use KDEConnect (as I do on my Kubuntu, Windows 11 & Android phone) on my Kindle Fire HD. The app works great for everything except SMS. I can see no way to have messages from phone (even when connected to the phone from Kindle) appear on the Kindle. Solutions found on the web all point to r/kde, which I can now not see on Reddit. It said someone used Silence SMS app. I installed Silence (F-droid) on the Kindle & Phone, but cannot seem to change the settings in Kindle to switch SMS & MMS “on” so am not getting the messages. Is there a reason that only the SMS part of KDEConnect does not sync with Kindle the way all other devices do? Any help much appreciated.