@sylumer @agiletortoise Thanks both, I will try to explain it better:
If I add input from the ‘scribble’ feature, for example, when I am outside range of my iPhone and Wifi a draft is created which is synced when back in range.
If I understand @sylumer correctly it is possible to retain dictated text when the watch is not connected, however I get a Dictation failed error when I try to input using this method, which I had assumed is a hardware limitation.
I’m using English (Ireland) on my iPhone which is mirrored on the watch.
In the watch settings General > Dictation the following message is show if that is relevant:
Support for on-device dictation in English (United Sates) on your watch is downloading.
(Apple Watch SE and iPhone 6S, both latest OS)